Bump laravel-mix from 5.0.9 to 6.0.49

Bumps [laravel-mix](https://github.com/JeffreyWay/laravel-mix) from 5.0.9 to 6.0.49.
- [Release notes](https://github.com/JeffreyWay/laravel-mix/releases)
- [Changelog](https://github.com/laravel-mix/laravel-mix/blob/master/CHANGELOG.md)
- [Upgrade guide](https://github.com/laravel-mix/laravel-mix/blob/master/UPGRADE.md)
- [Commits](https://github.com/JeffreyWay/laravel-mix/commits)

---
updated-dependencies:
- dependency-name: laravel-mix
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -15,7 +15,7 @@
         "bootstrap": "^4.6.0",
         "cross-env": "^7.0",
         "jquery": "^3.5",
-        "laravel-mix": "^5.0.9",
+        "laravel-mix": "^6.0.49",
         "lodash": "^4.17.21",
         "popper.js": "^1.12",
         "react": "^17.0.1",