Update lesshint to 6.3.0

Author: jwilsson

package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "atom-linter": "^10.0.0",
     "atom-package-deps": "^4.0.1",
-    "lesshint": "^6.2.0"
+    "lesshint": "^6.3.0"
   },
   "devDependencies": {
     "babel-eslint": "^10.0.0",