Bump loader-utils from 0.2.17 to 1.4.2 in /frontend

Bumps [loader-utils](https://github.com/webpack/loader-utils) from 0.2.17 to 1.4.2.
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v1.4.2/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v0.2.17...v1.4.2)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
...

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

frontend/package.json

@@ -30,7 +30,7 @@
     "zone.js": "^0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.7.0",
+    "@angular-devkit/build-angular": "~0.7.5",
     "@angular/cli": "^6.1.5",
     "@angular/compiler-cli": "6.1.4",
     "@angular/language-service": "6.1.4",