Merge pull request #3 from chesszebra/dependabot/composer/doctrine/coding-standard-9.0.0

Bump doctrine/coding-standard from 8.2.0 to 9.0.0

Author: waltertamboer

composer.json

@@ -20,7 +20,7 @@
     "license": "MIT",
     "require": {
         "php": "^7.2",
-        "doctrine/coding-standard": "^8.2"
+        "doctrine/coding-standard": "^9.0"
     },
     "require-dev": {
         "roave/security-advisories": "dev-master"