ci: update PHP version requirement to ^8.2 and adjust workflow matrix

Author: victor-teles

.github/workflows/tests.yaml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [8.1, 8.2, 8.3, 8.4]
+        php-version: [8.2, 8.3, 8.4]
         composer-flags: [null, --prefer-lowest]
     steps:
       - uses: actions/checkout@v2

composer.json

@@ -19,7 +19,7 @@
     }
   ],
   "require": {
-    "php": "^8.1",
+    "php": "^8.2",
     "ext-json": "*",
     "composer/semver": "^3.0",
     "zoon/rialto": "^1.5",