Bump ts-loader from 6.0.4 to 6.2.1

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 6.0.4 to 6.2.1.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v6.0.4...v6.2.1)

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

package.json

@@ -78,7 +78,7 @@
     "react-color": "^2.17.3",
     "react-dom": "^16.9.0",
     "ts-jest": "^24.1.0",
-    "ts-loader": "^6.0.4",
+    "ts-loader": "^6.2.1",
     "tslint": "^5.18.0",
     "tslint-react": "^4.0.0",
     "typescript": "^3.5.3",