Remove PHP 8.1 supports

Author: Shishamou

.github/workflows/coverage.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.4, 8.0, 8.1]
+        php: [7.4, 8.0]
         stability: [ prefer-stable ]
 
     name: PHP ${{ matrix.php }}

composer.json

@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "php": "^7.4|^8.0"
+    "php": "^7.4|~8.0"
   },
   "require-dev": {
     "orchestra/testbench": "4.x"