Merge pull request #174 from gary-kim/renovate/less-loader-6.x

chore(deps): update dependency less-loader to v6

Author: gary-kim

package-lock.json

@@ -52,7 +52,7 @@
     "geckodriver": "^1.19.1",
     "jszip": "^2.6.1",
     "less": "^3.11.1",
-    "less-loader": "^5.0.0",
+    "less-loader": "^6.0.0",
     "nightwatch": "^1.3.4",
     "rewire": "^4.0.1",
     "vue": "^2.6.11",