PHP 8 compatibility

.gitattributes

@@ -0,0 +1,9 @@
+/.devcontainer  export-ignore
+/.github        export-ignore
+/.vscode        export-ignore
+/tests          export-ignore
+/.gitignore     export-ignore
+/.phpcs.xml     export-ignore
+/.phplint.yml   export-ignore
+/.styleci.yml   export-ignore
+/phpunit.xml    export-ignore

.github/workflows/php.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-versions: ['7.1', '7.2', '7.3', '7.4']
+        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.1', '8.2', '8.3']
     steps:
     - uses: actions/checkout@v4
 
@@ -30,7 +30,7 @@ jobs:
 
     - name: Get composer cache directory
       id: composer-cache
-      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
 
     - name: Cache composer dependencies
       uses: actions/cache@v4
@@ -40,7 +40,7 @@ jobs:
         restore-keys: ${{ runner.os }}-composer-
 
     - name: Install Composer dependencies
-      run: composer install --no-progress --no-suggest --prefer-dist --optimize-autoloader
+      run: composer update && composer install --no-progress --prefer-dist
 
     - name: Run lint
       run: composer lint

.gitignore

@@ -1,2 +1,2 @@
 vendor/
-.phplint-cache
+.phplint.cache/

composer.json

@@ -30,24 +30,22 @@
         "sort-packages": true
     },
     "require": {
-        "php": "^7.1",
+        "php": "^7.1|^8.1",
         "ext-intl": "*",
         "ext-json": "*"
     },
     "require-dev": {
-        "overtrue/phplint": "^1.1",
+        "overtrue/phplint": "^3|^9",
         "pds/skeleton": "^1.0.0",
         "phpmd/phpmd": "@stable",
-        "phpstan/phpstan": "^0.12",
-        "phpunit/phpunit": "^7.5",
-        "sebastian/phpcpd": "^4.1",
-        "squizlabs/php_codesniffer": "^3.5"
+        "phpstan/phpstan": "^1|^2.1",
+        "phpunit/phpunit": "^7|^10.5|^11.5",
+        "squizlabs/php_codesniffer": "^3.11"
     },
     "scripts": {
         "lint": [
             "phplint",
             "phpcs src",
-            "phpcpd src",
             "phpstan analyse src tests --level=1",
             "phpmd src text codesize,unusedcode,naming,design --ignore-violations-on-exit"
         ],