Adding support for Ubuntu 22.04 LTS (PHP v8.1)

Author: stephen-hill

.github/workflows/php.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [8.3, 8.4]
+        php-version: [8.1, 8.2, 8.3, 8.4]
 
     steps:
       - name: Checkout repository

composer.json

@@ -2,7 +2,7 @@
     "name": "stephenhill/base58",
     "description": "Base58 Encoding and Decoding Library for PHP",
     "require-dev": {
-        "phpunit/phpunit": "12.*"
+        "phpunit/phpunit": "11.*"
     },
     "license": "MIT",
     "authors": [