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

@@ -58,7 +58,7 @@
     "nyc": "^15.1.0",
     "playwright": "^1.3.0",
     "source-map-loader": "^1.1.0",
-    "ts-loader": "^8.0.3",
+    "ts-loader": "^8.0.4",
     "typescript": "4.0",
     "utf8": "^3.0.0",
     "webpack": "^4.44.1",