🚨 add auto lint test capability

Author: willpower232

composer.json

@@ -21,7 +21,8 @@
         "php": ">=5.6.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "@stable"
+        "phpunit/phpunit": "@stable",
+        "php-parallel-lint/php-parallel-lint": "^1.2"
     },
     "suggest": {
         "bacon/bacon-qr-code": "Needed for BaconQrCodeProvider provider",
@@ -38,6 +39,9 @@
         }
     },
     "scripts": {
+        "lint": [
+            "parallel-lint --exclude vendor ."
+        ],
         "test": [
             "XDEBUG_MODE=coverage phpunit"
         ]