add PHP 8.3 and 8.4 support

Author: someniatko

.github/workflows/ci.yml

@@ -33,3 +33,17 @@ jobs:
 
             -   name: unit tests
                 run: php vendor/bin/phpunit
+
+    test-84:
+        runs-on: ubuntu-22.04
+        steps:
+            -   uses: actions/checkout@v3
+            -   uses: shivammathur/setup-php@v2
+                with:
+                    php-version: 8.4
+                    tools: composer:v2
+                    coverage: none
+            -   run: composer install -o --ignore-platform-reqs # vimeo/psalm is not supported yet on PHP 8.4
+
+            -   name: unit tests
+                run: php vendor/bin/phpunit

composer.json

@@ -3,7 +3,7 @@
     "license": "MIT",
     "description": "Functional-ish generic Result type: either Success or Error",
     "require": {
-        "php": "7.4.* || 8.0.* || 8.1.* || 8.2.*"
+        "php": "7.4.* || 8.0.* || 8.1.* || 8.2.* || 8.3.* || 8.4.*"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",