Apply PER2.0 phpcs (part 1)

Author: SerafimArts

composer.json

@@ -27,7 +27,9 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6|^10.0",
-        "vimeo/psalm": "^5.22"
+        "phpstan/extension-installer": "^1.4",
+        "phpstan/phpstan": "^1.11",
+        "phpstan/phpstan-strict-rules": "^1.6"
     },
     "autoload-dev": {
         "psr-4": {

phpstan.neon

@@ -0,0 +1,12 @@
+includes:
+  - phar://phpstan.phar/conf/bleedingEdge.neon
+parameters:
+  level: 1
+  strictRules:
+    allRules: true
+  fileExtensions:
+    - php
+  paths:
+    - src
+  tmpDir: vendor/.cache.phpstan
+  reportUnmatchedIgnoredErrors: false