build(deps-dev): bump ts-loader from 7.0.3 to 7.0.4 (#349)

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 7.0.3 to 7.0.4.
- [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/v7.0.3...v7.0.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

html/package.json

@@ -51,7 +51,7 @@
     "style-loader": "^1.2.1",
     "terser-webpack-plugin": "^3.0.1",
     "through2": "^3.0.1",
-    "ts-loader": "^7.0.3",
+    "ts-loader": "^7.0.4",
     "tslint": "^6.1.2",
     "tslint-loader": "^3.5.4",
     "typescript": "^3.8.3",