test(RequestClient): specs for communicating with self-signed server

package.json

@@ -41,17 +41,21 @@
   "license": "ISC",
   "devDependencies": {
     "@types/axios": "^0.14.0",
+    "@types/express": "^4.17.13",
     "@types/form-data": "^2.5.0",
     "@types/jest": "^27.0.1",
     "@types/mime": "^2.0.3",
+    "@types/pem": "^1.9.6",
     "@types/tough-cookie": "^4.0.1",
     "copyfiles": "^2.4.1",
     "cp": "^0.2.0",
     "dotenv": "^10.0.0",
+    "express": "^4.17.1",
     "jest": "^27.2.0",
     "jest-extended": "^0.11.5",
     "node-polyfill-webpack-plugin": "^1.1.4",
     "path": "^0.12.7",
+    "pem": "^1.14.4",
     "process": "^0.11.10",
     "rimraf": "^3.0.2",
     "semantic-release": "^17.4.7",