Add baseline; update gh workflow

Author: uuf6429

.gitattributes

@@ -11,4 +11,5 @@
 /phpunit.dist.xml           export-ignore
 /.php-cs-fixer.dist.php     export-ignore
 /phpstan.dist.neon          export-ignore
+/phpstan-baseline.neon      export-ignore
 /README.md                  export-ignore

.github/workflows/build.yml

@@ -8,6 +8,17 @@ on:
     types: [ created ]
 
 jobs:
+  check_composer:
+    name: Check composer.json
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          php-version: '8.3'
+      - run: composer validate --strict --no-check-lock
+
   check_code_style:
     name: Check code style
     runs-on: ubuntu-latest
@@ -21,6 +32,19 @@ jobs:
         run: composer update
       - run: ./vendor/bin/php-cs-fixer fix --dry-run --diff --show-progress=dots
 
+  static_analysis:
+    name: Static analysis
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          php-version: '8.3'
+      - name: Install dependencies
+        run: composer update
+      - run: ./vendor/bin/phpstan analyze
+
   tests:
     runs-on: ubuntu-latest
     name: Build and test