Fix DbalReader data type and restore CI/Dependabot configs

- Allow array|false|null for iterator end marker (PHP 8.2+)
- Restore non-empty GitHub Actions workflow and Dependabot YAML

Author: slashrsm

.github/dependabot.yml

@@ -1 +1,13 @@
-
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+  - package-ecosystem: composer
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 5
+    versioning-strategy: widen

.github/workflows/test.yml

@@ -1 +1,61 @@
+name: Test
 
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: [ '8.2', '8.3', '8.4', '8.5' ]
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          coverage: none
+          tools: composer:v2
+          extensions: pdo_sqlite
+
+      - name: Validate Composer metadata
+        run: |
+          if [ -f composer.lock ]; then
+            composer validate --strict --no-interaction
+          else
+            composer validate --strict --no-check-lock --no-interaction
+          fi
+
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> "$GITHUB_OUTPUT"
+
+      - name: Cache Composer packages
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ matrix.php-versions }}-${{ hashFiles('**/composer.json', '**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-${{ matrix.php-versions }}-
+
+      - name: Install dependencies
+        run: |
+          if [ -f composer.lock ]; then
+            composer install --prefer-dist --no-progress --no-interaction
+          else
+            composer update --prefer-dist --no-progress --no-interaction
+          fi
+
+      - name: Run test suite
+        run: vendor/bin/phpunit

src/DbalReader.php

@@ -13,7 +13,7 @@ class DbalReader implements CountableReader
 {
     private Connection $connection;
 
-    private ?array $data = null;
+    private array|false|null $data = null;
 
     private ?Result $result = null;