Update scrutinizer config

Author: chadicus

.scrutinizer.yml

@@ -16,7 +16,7 @@ tools:
     php_pdepend: true
     php_sim: true
 build_failure_conditions:
-    - 'elements.rating(<= D).new.exists'           # No new classes/methods with a rating of D or worse allowed (useful for legacy code)
-    - '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("scrutinizer.quality", < 6)' # Code Quality Rating drops below 6
+    - 'elements.rating(< C).new.exists'
+    - 'issues.label("coding-style").new.exists'
+    - 'issues.severity(>= MAJOR).new.exists'
+    - 'project.metric("scrutinizer.quality", < 7)'