Use PHPStan instead of Psalm

Author: sebastianbergmann

.gitattributes

@@ -1,14 +1,14 @@
-/.gitattributes export-ignore
-/.gitignore     export-ignore
-/.github        export-ignore
-/.phive         export-ignore
-/.php-cs-fixer.dist.php   export-ignore
-/.psalm         export-ignore
-/build          export-ignore
-/build.xml      export-ignore
-/phpunit.xml    export-ignore
-/tests          export-ignore
-/tools          export-ignore
-/tools/*        binary
+/.gitattributes         export-ignore
+/.gitignore             export-ignore
+/.github                export-ignore
+/.phive                 export-ignore
+/.php-cs-fixer.dist.php export-ignore
+/build                  export-ignore
+/build.xml              export-ignore
+/phpstan.neon           export-ignore
+/phpunit.xml            export-ignore
+/tests                  export-ignore
+/tools                  export-ignore
+/tools/*                binary
 
 *.php diff=php

.github/workflows/ci.yml

@@ -30,8 +30,8 @@ jobs:
       - name: Run PHP-CS-Fixer
         run: ./tools/php-cs-fixer fix --dry-run --show-progress=dots --using-cache=no --verbose
 
-  type-checker:
-    name: Type Checker
+  static-analysis:
+    name: Static Analysis
 
     runs-on: ubuntu-latest
 
@@ -47,11 +47,11 @@ jobs:
           coverage: none
           tools: none
 
-      - name: Update dependencies with composer
+      - name: Install dependencies with Composer
         run: ./tools/composer update --no-interaction --no-ansi --no-progress
 
-      - name: Run vimeo/psalm
-        run: ./tools/psalm --config=.psalm/config.xml --no-progress --shepherd --show-info=false --stats
+      - name: Run PHPStan
+        run: ./tools/phpstan analyse --no-progress --error-format=github
 
   tests:
     name: Tests