chore(deps-dev): bump ts-loader from 6.2.2 to 8.0.17

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 6.2.2 to 8.0.17.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v6.2.2...v8.0.17)

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

package.json

@@ -73,7 +73,7 @@
     "prettier": "^1.19.1",
     "supertest": "^6.1.3",
     "ts-jest": "26.5.1",
-    "ts-loader": "^6.2.1",
+    "ts-loader": "^8.0.17",
     "ts-node": "^8.10.2",
     "tsconfig-paths": "^3.9.0",
     "typescript": "^3.9.5"