chore(deps-dev): bump ts-loader from 8.0.3 to 8.0.4

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 8.0.3 to 8.0.4.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TypeStrong/ts-loader/compare/v8.0.3...8.0.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -44,7 +44,7 @@
     "rimraf": "^3.0.2",
     "semantic-release": "^17.1.1",
     "ts-jest": "^25.5.1",
-    "ts-loader": "^8.0.3",
+    "ts-loader": "^8.0.4",
     "tslint": "^6.1.3",
     "tslint-config-prettier": "^1.18.0",
     "typedoc": "^0.17.8",