diff --git a/.travis.yml b/.travis.yml
index 85a3850..f51915a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,13 @@
 language: node_js
 node_js:
-  - "6"
+  - "10"
+
+services:
+  - xvfb
 
 before_install:
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
 
 script:
   - npm run pretest
diff --git a/package-lock.json b/package-lock.json
index be85541..9526283 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2292,15 +2292,6 @@
         "string-width": "^1.0.1"
       }
     },
-    "ansi-colors": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-1.1.0.tgz",
-      "integrity": "sha512-SFKX67auSNoVR38N3L+nvsPjOE0bybKTYbkf5tRvushrAPQ9V75huw0ZxBkKVeRU9kqH3d6HA4xTckbwZ4ixmA==",
-      "dev": true,
-      "requires": {
-        "ansi-wrap": "^0.1.0"
-      }
-    },
     "ansi-escapes": {
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.2.1.tgz",
@@ -2515,12 +2506,6 @@
       "integrity": "sha1-nlKHYrSpBmrRY6aWKjZEGOlibs4=",
       "dev": true
     },
-    "array-slice": {
-      "version": "0.2.3",
-      "resolved": "https://registry.npmjs.org/array-slice/-/array-slice-0.2.3.tgz",
-      "integrity": "sha1-3Tz7gO15c6dRF82sabC5nshhhvU=",
-      "dev": true
-    },
     "array-union": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
@@ -2543,9 +2528,9 @@
       "dev": true
     },
     "arraybuffer.slice": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco=",
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
+      "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog==",
       "dev": true
     },
     "arrify": {
@@ -3157,9 +3142,9 @@
       }
     },
     "blob": {
-      "version": "0.0.4",
-      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE=",
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
+      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig==",
       "dev": true
     },
     "blocking-proxy": {
@@ -3328,12 +3313,6 @@
       "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=",
       "dev": true
     },
-    "browser-stdout": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
-      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
-      "dev": true
-    },
     "browser-sync": {
       "version": "2.26.7",
       "resolved": "https://registry.npmjs.org/browser-sync/-/browser-sync-2.26.7.tgz",
@@ -4691,15 +4670,6 @@
       "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
       "dev": true
     },
-    "combine-lists": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/combine-lists/-/combine-lists-1.0.1.tgz",
-      "integrity": "sha1-RYwH4J4NkA/Ci3Cj/sLazR0st/Y=",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.5.0"
-      }
-    },
     "combined-stream": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
@@ -4875,8 +4845,7 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "constants-browserify": {
       "version": "1.0.0",
@@ -5802,9 +5771,9 @@
       },
       "dependencies": {
         "buffer": {
-          "version": "5.4.0",
-          "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.0.tgz",
-          "integrity": "sha512-Xpgy0IwHK2N01ncykXTy6FpCWuM+CJSHoPVBLyNqyrWxsedpLvwsYUhf0ME3WRFNUhos0dMamz9cOS/xRDtU5g==",
+          "version": "5.4.3",
+          "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.3.tgz",
+          "integrity": "sha512-zvj65TkFeIt3i6aj5bIvJDzjjQQGs4o/sNoezg1F1kYap9Nu2jcUdpwzRSJTHMMzG0H7bZkn4rNQpImhuxWX2A==",
           "dev": true,
           "requires": {
             "base64-js": "^1.0.2",
@@ -6070,6 +6039,12 @@
       "integrity": "sha1-RuE6udqOMJdFyNAc5UchPr2y/j8=",
       "dev": true
     },
+    "date-format": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/date-format/-/date-format-2.1.0.tgz",
+      "integrity": "sha512-bYQuGLeFxhkxNOF3rcMtiZxvCBAquGzZm6oWA1oZ0g2THUzivaRhv8uOhdr19LmoobSOLoIAxeUK2RdbM8IFTA==",
+      "dev": true
+    },
     "date-now": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/date-now/-/date-now-0.1.4.tgz",
@@ -6600,69 +6575,63 @@
       }
     },
     "engine.io": {
-      "version": "1.8.2",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-1.8.2.tgz",
-      "integrity": "sha1-a1m+cws0jAElsKRYneHDVavPen4=",
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.2.1.tgz",
+      "integrity": "sha512-+VlKzHzMhaU+GsCIg4AoXF1UdDFjHHwMmMKqMJNDNLlUlejz58FCy4LBqB2YVJskHGYl06BatYWKP2TVdVXE5w==",
       "dev": true,
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.4",
         "base64id": "1.0.0",
         "cookie": "0.3.1",
-        "debug": "2.3.3",
-        "engine.io-parser": "1.3.2",
-        "ws": "1.1.1"
+        "debug": "~3.1.0",
+        "engine.io-parser": "~2.1.0",
+        "ws": "~3.3.1"
       },
       "dependencies": {
-        "accepts": {
-          "version": "1.3.3",
-          "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.3.tgz",
-          "integrity": "sha1-w8p0NJOGSMPg2cHjKN1otiLChMo=",
-          "dev": true,
-          "requires": {
-            "mime-types": "~2.1.11",
-            "negotiator": "0.6.1"
-          }
-        },
         "debug": {
-          "version": "2.3.3",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
-          "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
           "dev": true,
           "requires": {
-            "ms": "0.7.2"
+            "ms": "2.0.0"
           }
         },
-        "ms": {
-          "version": "0.7.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.2.tgz",
-          "integrity": "sha1-riXPJRKziFodldfwN4aNhDESR2U=",
+        "ultron": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
+          "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==",
           "dev": true
         },
-        "negotiator": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
-          "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=",
-          "dev": true
+        "ws": {
+          "version": "3.3.3",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+          "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
+          "dev": true,
+          "requires": {
+            "async-limiter": "~1.0.0",
+            "safe-buffer": "~5.1.0",
+            "ultron": "~1.1.0"
+          }
         }
       }
     },
     "engine.io-client": {
-      "version": "1.8.2",
-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-1.8.2.tgz",
-      "integrity": "sha1-w4dnVH8qfRhPV1L28K1QEAZwN2Y=",
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.2.1.tgz",
+      "integrity": "sha512-y5AbkytWeM4jQr7m/koQLc5AxpRKC1hEVUb/s1FUAWEJq5AzJJ4NLvzuKPuxtDi5Mq755WuDvZ6Iv2rXj4PTzw==",
       "dev": true,
       "requires": {
         "component-emitter": "1.2.1",
         "component-inherit": "0.0.3",
-        "debug": "2.3.3",
-        "engine.io-parser": "1.3.2",
+        "debug": "~3.1.0",
+        "engine.io-parser": "~2.1.1",
         "has-cors": "1.1.0",
         "indexof": "0.0.1",
-        "parsejson": "0.0.3",
         "parseqs": "0.0.5",
         "parseuri": "0.0.5",
-        "ws": "1.1.1",
-        "xmlhttprequest-ssl": "1.5.3",
+        "ws": "~3.3.1",
+        "xmlhttprequest-ssl": "~1.5.4",
         "yeast": "0.1.2"
       },
       "dependencies": {
@@ -6673,34 +6642,44 @@
           "dev": true
         },
         "debug": {
-          "version": "2.3.3",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
-          "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
           "dev": true,
           "requires": {
-            "ms": "0.7.2"
+            "ms": "2.0.0"
           }
         },
-        "ms": {
-          "version": "0.7.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.2.tgz",
-          "integrity": "sha1-riXPJRKziFodldfwN4aNhDESR2U=",
+        "ultron": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
+          "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==",
           "dev": true
+        },
+        "ws": {
+          "version": "3.3.3",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+          "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
+          "dev": true,
+          "requires": {
+            "async-limiter": "~1.0.0",
+            "safe-buffer": "~5.1.0",
+            "ultron": "~1.1.0"
+          }
         }
       }
     },
     "engine.io-parser": {
-      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-1.3.2.tgz",
-      "integrity": "sha1-k3sHnwAH0Ik+xW1GyyILjLQ1Igo=",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.3.tgz",
+      "integrity": "sha512-6HXPre2O4Houl7c4g7Ic/XzPnHBvaEmN90vtRO9uLmwtRqQmTOw0QMevL1TOfL2Cpu1VzsaTmMotQgMdkzGkVA==",
       "dev": true,
       "requires": {
         "after": "0.8.2",
-        "arraybuffer.slice": "0.0.6",
+        "arraybuffer.slice": "~0.0.7",
         "base64-arraybuffer": "0.1.5",
-        "blob": "0.0.4",
-        "has-binary": "0.1.7",
-        "wtf-8": "1.0.0"
+        "blob": "0.0.5",
+        "has-binary2": "~1.0.2"
       }
     },
     "enhanced-resolve": {
@@ -7003,77 +6982,12 @@
         }
       }
     },
-    "execa": {
-      "version": "0.10.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-0.10.0.tgz",
-      "integrity": "sha512-7XOMnz8Ynx1gGo/3hyV9loYNPWM94jG3+3T3Y8tsfSstFmETmENCMU/A/zj8Lyaj1lkgEepKepvd6240tBRvlw==",
-      "dev": true,
-      "requires": {
-        "cross-spawn": "^6.0.0",
-        "get-stream": "^3.0.0",
-        "is-stream": "^1.1.0",
-        "npm-run-path": "^2.0.0",
-        "p-finally": "^1.0.0",
-        "signal-exit": "^3.0.0",
-        "strip-eof": "^1.0.0"
-      }
-    },
     "exit": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/exit/-/exit-0.1.2.tgz",
       "integrity": "sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=",
       "dev": true
     },
-    "expand-braces": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/expand-braces/-/expand-braces-0.1.2.tgz",
-      "integrity": "sha1-SIsdHSRRyz06axks/AMPRMWFX+o=",
-      "dev": true,
-      "requires": {
-        "array-slice": "^0.2.3",
-        "array-unique": "^0.2.1",
-        "braces": "^0.1.2"
-      },
-      "dependencies": {
-        "array-unique": {
-          "version": "0.2.1",
-          "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
-          "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
-          "dev": true
-        },
-        "braces": {
-          "version": "0.1.5",
-          "resolved": "https://registry.npmjs.org/braces/-/braces-0.1.5.tgz",
-          "integrity": "sha1-wIVxEIUpHYt1/ddOqw+FlygHEeY=",
-          "dev": true,
-          "requires": {
-            "expand-range": "^0.1.0"
-          }
-        },
-        "expand-range": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/expand-range/-/expand-range-0.1.1.tgz",
-          "integrity": "sha1-TLjtoJk8pW+k9B/ELzy7TMrf8EQ=",
-          "dev": true,
-          "requires": {
-            "is-number": "^0.1.1",
-            "repeat-string": "^0.2.2"
-          }
-        },
-        "is-number": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/is-number/-/is-number-0.1.1.tgz",
-          "integrity": "sha1-aaevEWlj1HIG7JvZtIoUIW8eOAY=",
-          "dev": true
-        },
-        "repeat-string": {
-          "version": "0.2.2",
-          "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-0.2.2.tgz",
-          "integrity": "sha1-x6jTI2BoNiBZp+RlH8aITosftK4=",
-          "dev": true
-        }
-      }
-    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -7627,6 +7541,12 @@
         "pinkie-promise": "^2.0.0"
       }
     },
+    "flatted": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-2.0.1.tgz",
+      "integrity": "sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==",
+      "dev": true
+    },
     "flush-write-stream": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/flush-write-stream/-/flush-write-stream-1.1.1.tgz",
@@ -8458,50 +8378,6 @@
       "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=",
       "dev": true
     },
-    "growl": {
-      "version": "1.10.5",
-      "resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
-      "integrity": "sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==",
-      "dev": true
-    },
-    "gulp-mocha": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/gulp-mocha/-/gulp-mocha-6.0.0.tgz",
-      "integrity": "sha512-FfBldW5ttnDpKf4Sg6/BLOOKCCbr5mbixDGK1t02/8oSrTCwNhgN/mdszG3cuQuYNzuouUdw4EH/mlYtgUscPg==",
-      "dev": true,
-      "requires": {
-        "dargs": "^5.1.0",
-        "execa": "^0.10.0",
-        "mocha": "^5.2.0",
-        "npm-run-path": "^2.0.2",
-        "plugin-error": "^1.0.1",
-        "supports-color": "^5.4.0",
-        "through2": "^2.0.3"
-      },
-      "dependencies": {
-        "dargs": {
-          "version": "5.1.0",
-          "resolved": "https://registry.npmjs.org/dargs/-/dargs-5.1.0.tgz",
-          "integrity": "sha1-7H6lDHhWTNNsnV7Bj2Yyn63ieCk=",
-          "dev": true
-        },
-        "has-flag": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
-      }
-    },
     "gulp-util": {
       "version": "3.0.7",
       "resolved": "https://registry.npmjs.org/gulp-util/-/gulp-util-3.0.7.tgz",
@@ -8663,23 +8539,6 @@
         "ansi-regex": "^2.0.0"
       }
     },
-    "has-binary": {
-      "version": "0.1.7",
-      "resolved": "https://registry.npmjs.org/has-binary/-/has-binary-0.1.7.tgz",
-      "integrity": "sha1-aOYesWIQyVRaClzOBqhzkS/h5ow=",
-      "dev": true,
-      "requires": {
-        "isarray": "0.0.1"
-      },
-      "dependencies": {
-        "isarray": {
-          "version": "0.0.1",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
-          "dev": true
-        }
-      }
-    },
     "has-binary2": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/has-binary2/-/has-binary2-1.0.3.tgz",
@@ -9739,9 +9598,9 @@
           }
         },
         "handlebars": {
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-          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
           "dev": true,
           "requires": {
-            "ms": "0.7.1"
+            "ms": "2.0.0"
           }
         },
         "isarray": {
-          "version": "0.0.1",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
-          "dev": true
-        },
-        "ms": {
-          "version": "0.7.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
-          "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
+          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=",
           "dev": true
         }
       }
@@ -16311,6 +15764,62 @@
         "limiter": "^1.0.5"
       }
     },
+    "streamroller": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-1.0.6.tgz",
+      "integrity": "sha512-3QC47Mhv3/aZNFpDDVO44qQb9gwB9QggMEE0sQmkTAwBVYdBRWISdsywlkfm5II1Q5y/pmrHflti/IgmIzdDBg==",
+      "dev": true,
+      "requires": {
+        "async": "^2.6.2",
+        "date-format": "^2.0.0",
+        "debug": "^3.2.6",
+        "fs-extra": "^7.0.1",
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.2.6",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "fs-extra": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
+          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.1.2",
+            "jsonfile": "^4.0.0",
+            "universalify": "^0.1.0"
+          }
+        },
+        "jsonfile": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.1.6"
+          }
+        },
+        "lodash": {
+          "version": "4.17.15",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+          "dev": true
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        }
+      }
+    },
     "strict-uri-encode": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz",
@@ -18043,15 +17552,13 @@
       }
     },
     "wd": {
-      "version": "1.11.3",
-      "resolved": "https://registry.npmjs.org/wd/-/wd-1.11.3.tgz",
-      "integrity": "sha512-doB7E6DDhis6sSCfWps9Uz0UBBPAySv1x96KH6klfHp8y89HvhqEq3c0O8LPZhG37egJULN0m7+M9t16xUTG0g==",
+      "version": "1.11.4",
+      "resolved": "https://registry.npmjs.org/wd/-/wd-1.11.4.tgz",
+      "integrity": "sha512-FHL+ofdCoU2FGvDFser8rXI4GFwwcyAaUuvddtdctig2X0zVVT6p7FAXf7nS0z7wTwXtEuZXX7MrnVTvFPqJTQ==",
       "dev": true,
       "requires": {
         "archiver": "^3.0.0",
         "async": "^2.0.0",
-        "fancy-log": "^1.3.3",
-        "gulp-mocha": "^6.0.0",
         "lodash": "^4.0.0",
         "mkdirp": "^0.5.1",
         "q": "^1.5.1",
@@ -18848,12 +18355,6 @@
         "ultron": "1.0.x"
       }
     },
-    "wtf-8": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wtf-8/-/wtf-8-1.0.0.tgz",
-      "integrity": "sha1-OS2LotDxw00e4tYw8V0O+2jhBIo=",
-      "dev": true
-    },
     "xdg-basedir": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-2.0.0.tgz",
@@ -18888,9 +18389,9 @@
       "dev": true
     },
     "xmlhttprequest-ssl": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.3.tgz",
-      "integrity": "sha1-GFqIjATspGw+QHDZn3tJ3jUomS0=",
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
       "dev": true
     },
     "xtend": {
diff --git a/package.json b/package.json
index 946e6ca..e3be74e 100644
--- a/package.json
+++ b/package.json
@@ -73,17 +73,16 @@
     "gitignore-to-glob": "0.3.0",
     "google-code-prettify": "1.0.5",
     "html-loader": "^0.5.5",
-    "jasmine": "2.5.3",
-    "jasmine-core": "2.5.2",
+    "jasmine-core": "3.1.0",
     "jasmine-data-provider": "2.2.0",
-    "jasmine-spec-reporter": "3.2.0",
-    "karma": "1.4.0",
-    "karma-chrome-launcher": "^2.0.0",
+    "jasmine-spec-reporter": "4.2.1",
+    "karma": "4.1.0",
+    "karma-chrome-launcher": "2.2.0",
     "karma-cli": "^1.0.1",
-    "karma-coverage-istanbul-reporter": "^1.3.0",
-    "karma-jasmine": "^1.0.2",
-    "karma-remap-istanbul": "0.4.0",
-    "karma-sauce-launcher": "1.1.0",
+    "karma-coverage-istanbul-reporter": "1.4.3",
+    "karma-jasmine": "1.1.2",
+    "karma-remap-istanbul": "0.6.0",
+    "karma-sauce-launcher": "1.2.0",
     "lite-server": "2.2.2",
     "lodash": "4.17.4",
     "markdown-loader": "^5.1.0",
diff --git a/test/karma.conf.js b/test/karma.conf.js
index a9d05c8..7e99d34 100644
--- a/test/karma.conf.js
+++ b/test/karma.conf.js
@@ -23,12 +23,20 @@ module.exports = function (config) {
     colors: true,
     logLevel: config.LOG_INFO,
     autoWatch: true,
-    browsers: ['Chrome'],
+    browsers: ['ChromeHeadless'],
+    browserNoActivityTimeout: 20000,
+    browserDisconnectTolerance: 2,
+    browserDisconnectTimeout: 5000,
     singleRun: true,
     customLaunchers: {
       Chrome_travis_ci: {
-        base: 'Chrome',
-        flags: ['--no-sandbox']
+        base: 'ChromeHeadless',
+        flags: [
+          '--headless',
+          '--disable-gpu',
+          '--no-sandbox',
+          '--remote-debugging-port=9222'
+        ]
       }
     },
     mime: { 'text/x-typescript': ['ts','tsx'] },
@@ -59,10 +67,10 @@ module.exports = function (config) {
       },
       public: 'public'
     };
-    configuration.captureTimeout = 0;
+    configuration.captureTimeout = 60000;
     configuration.customLaunchers = customLaunchers();
     configuration.browsers = Object.keys(configuration.customLaunchers);
-    configuration.concurrency = 3;
+    configuration.concurrency = 4;
     configuration.browserDisconnectTolerance = 2;
     configuration.browserNoActivityTimeout = 20000;
     configuration.browserDisconnectTimeout = 5000;