build(deps-dev): bump ts-loader in /superset-frontend

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 8.0.7 to 8.0.16.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v8.0.7...v8.0.16)

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

superset-frontend/package.json

@@ -289,7 +289,7 @@
     "thread-loader": "^1.2.0",
     "transform-loader": "^0.2.3",
     "ts-jest": "^26.4.2",
-    "ts-loader": "^8.0.7",
+    "ts-loader": "^8.0.16",
     "typescript": "^4.0.3",
     "url-loader": "^1.0.1",
     "webpack": "^4.42.0",