Use phpstan instead of scrutinizer's own checker

.scrutinizer.yml

@@ -1,4 +1,10 @@
+checks:
+    php:
+        code_rating: true
 build:
+    dependencies:
+        override:
+            - command: 'composer install --ignore-platform-reqs --no-interaction'
     nodes:
         analysis:
             environment:
@@ -12,18 +18,13 @@ build:
                 override: true
             tests:
                 override:
-                    - php-scrutinizer-run
-
-    dependencies:
-        override:
-            - composer install --ignore-platform-reqs --no-interaction
+                    - command: ./vendor/bin/phpstan analyse --ansi --memory-limit 256M --error-format=checkstyle | sed '/^\s*$/d' > phpstan-checkstyle.xml
+                      analysis:
+                          file: phpstan-checkstyle.xml
+                          format: 'general-checkstyle'
 
 tools:
-    external_code_coverage:
-        timeout: 3600
+  php_code_coverage: true
 
 build_failure_conditions:
-    - 'elements.rating(<= C).new.exists'                        # No new classes/methods with a rating of C or worse allowed
-    - 'issues.label("coding-style").new.exists'                 # No new coding style issues allowed
-    - 'issues.severity(>= MAJOR).new.exists'                    # New issues of major or higher severity
     - 'project.metric_change("scrutinizer.test_coverage", < 0)' # Code Coverage decreased from previous inspection

phpstan.neon.dist

@@ -1,5 +1,5 @@
 parameters:
-    level: 2
+    level: 3
 
     paths:
         - %currentWorkingDirectory%/src