Bump ts-loader from 8.0.14 to 8.0.18 in /frontend

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 8.0.14 to 8.0.18.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v8.0.14...v8.0.18)

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

frontend/package.json

@@ -27,7 +27,7 @@
     "prettier": "2.2.1",
     "sass-loader": "^11.0.1",
     "style-loader": "^2.0.0",
-    "ts-loader": "^8.0.14",
+    "ts-loader": "^8.0.18",
     "typescript": "^4.2.3",
     "webpack": "^5.18.0",
     "webpack-cli": "^4.5.0"

frontend/yarn.lock

@@ -2484,10 +2484,10 @@ to-regex-range@^5.0.1:
   dependencies:
     is-number "^7.0.0"
 
-ts-loader@^8.0.14:
-  version "8.0.14"
-  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-8.0.14.tgz#e46ac1f8dcb88808d0b1335d2eae65b74bd78fe8"
-  integrity sha512-Jt/hHlUnApOZjnSjTmZ+AbD5BGlQFx3f1D0nYuNKwz0JJnuDGHJas6az+FlWKwwRTu+26GXpv249A8UAnYUpqA==
+ts-loader@^8.0.18:
+  version "8.0.18"
+  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-8.0.18.tgz#b2385cbe81c34ad9f997915129cdde3ad92a61ea"
+  integrity sha512-hRZzkydPX30XkLaQwJTDcWDoxZHK6IrEMDQpNd7tgcakFruFkeUp/aY+9hBb7BUGb+ZWKI0jiOGMo0MckwzdDQ==
   dependencies:
     chalk "^4.1.0"
     enhanced-resolve "^4.0.0"