Add isList validation (#1)

.github/workflows/php.yml

@@ -10,27 +10,37 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [ 8.1, 8.2 ]
+
+    name: PHP ${{ matrix.php }} tests
 
     steps:
-    - uses: actions/checkout@v2
+      - uses: shivammathur/setup-php@15c43e89cdef867065b0213be354c2841860869e
+        with:
+          php-version: ${{ matrix.php }}
+
+      - uses: actions/checkout@v3
 
-    - name: Validate composer.json and composer.lock
-      run: composer validate --strict
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
 
-    - name: Cache Composer packages
-      id: composer-cache
-      uses: actions/cache@v2
-      with:
-        path: vendor
-        key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-php-
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v2
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
 
-    - name: Install dependencies
-      run: composer install --prefer-dist --no-progress
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
 
-    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
-    # Docs: https://getcomposer.org/doc/articles/scripts.md
+      # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
+      # Docs: https://getcomposer.org/doc/articles/scripts.md
 
-    - name: Run test suite
-      run: composer run-script test
+      - name: Run test suite
+        run: composer run-script test

composer.json

@@ -19,7 +19,7 @@
     }
   ],
   "require": {
-    "php": ">=7.4",
+    "php": ">=8.1",
     "adbario/php-dot-notation": "^2.2"
   },
   "require-dev": {