Bump ts-loader from 3.5.0 to 4.1.0

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 3.5.0 to 4.1.0.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v3.5.0...v4.1.0)

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

package.json

@@ -62,7 +62,7 @@
     "photoswipe": "^4.1.2",
     "prettier": "1.11.1",
     "ts-jest": "22.4.2",
-    "ts-loader": "3.5.0",
+    "ts-loader": "4.1.0",
     "tslint": "5.9.1",
     "tslint-config-airbnb": "5.8.0",
     "tslint-config-prettier": "1.10.0",