Merge pull request #3973 from Laravel-Backpack/dependabot/npm_and_yarn/laravel-mix-6.0.39

Bump laravel-mix from 6.0.37 to 6.0.39

Author: tabacitu

package-lock.json

@@ -12,7 +12,7 @@
     "devDependencies": {
         "cross-env": "^7.0.3",
         "css-loader": "^5.2.6",
-        "laravel-mix": "^6.0.37",
+        "laravel-mix": "^6.0.39",
         "lodash": "^4.17.21",
         "pace": "0.0.4",
         "resolve-url-loader": "^4.0.0",