bump minimum PHP to 8.1

Author: mglaman

composer.json

@@ -2,7 +2,7 @@
     "name": "mglaman/drupalorg-cli",
     "description": "Command line interface for interacting with Drupal.org",
     "require": {
-        "php": "^7.4 || ^8.0",
+        "php": "^8.1",
         "ext-dom": "*",
         "ext-json": "*",
         "composer-runtime-api": "^2.0.0",
@@ -41,7 +41,7 @@
         "optimize-autoloader": true,
         "preferred-install": "dist",
         "platform": {
-            "php": "7.4"
+            "php": "8.1.99"
           },
         "allow-plugins": {
             "phpstan/extension-installer": true