[TASK] Add PHPStan rules for Safe-PHP

This will prevent unsafe function usage from getting added.

Closes #1168

Author: oliverklee

.github/dependabot.yml

@@ -22,6 +22,7 @@ updates:
           versions: [ ">= 9.0.0" ]
         - dependency-name: "rector/rector"
         - dependency-name: "thecodingmachine/safe"
+        - dependency-name: "thecodingmachine/phpstan-safe-rule"
       versioning-strategy: "increase"
       commit-message:
           prefix: "[Dependabot] "

composer.json

@@ -36,7 +36,8 @@
         "phpunit/phpunit": "8.5.46",
         "rawr/phpunit-data-provider": "3.3.1",
         "rector/rector": "1.2.10 || 2.1.7",
-        "rector/type-perfect": "1.0.0 || 2.1.0"
+        "rector/type-perfect": "1.0.0 || 2.1.0",
+        "thecodingmachine/phpstan-safe-rule": "1.2.0"
     },
     "suggest": {
         "ext-mbstring": "for parsing UTF-8 CSS"