Merge pull request #4 from phpcq/feature/phpunit-up-to-12

Add versions 10, 11 and 12

Author: discordier

phpcq-plugin.json

@@ -9,7 +9,7 @@
     },
     "tool": {
       "phpunit": {
-        "constraints": "^6.0 || ^7.0 || ^8.0 || ^9.0",
+        "constraints": "^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
         "sources": [
           {
             "type": "github",