Add PHPStan for static analysis and add support for PHP 7.4+ (#7)

Author: Greg0

.github/workflows/checks.yml

@@ -34,6 +34,9 @@ jobs:
       - name: Install dependencies
         run: composer install
 
+      - name: SAST
+        run: composer sast
+
       - name: Test
         run: composer test
 

composer.json

@@ -38,16 +38,19 @@
     }
   },
   "require": {
-    "psr/log": "^2.0"
+    "php": "^7.4 || ^8.0",
+    "ext-json": "*",
+    "psr/log": "^1.1"
   },
   "require-dev": {
-    "php": "^8.0",
-    "phpunit/phpunit": "^10"
+    "phpunit/phpunit": "^9",
+    "phpstan/phpstan": "^2.1"
   },
   "bin": [
     "featurevisor"
   ],
   "scripts": {
+    "sast": "phpstan analyse --memory-limit=256M",
     "test": "phpunit tests"
   },
   "license": [