Enable Scrutinizer build failure if coverage decrease

.scrutinizer.yml

@@ -1,5 +1,6 @@
 checks:
     php: true
+
 coding_style:
     php:
         spaces:
@@ -8,6 +9,20 @@ coding_style:
             around_operators:
                 concatenation: true
 
+build:
+    nodes:
+        analysis:
+            tests:
+                override:
+                    - phpcs-run
+                    - php-scrutinizer-run
+
 tools:
     external_code_coverage:
         timeout: 3600
+
+build_failure_conditions:
+    - 'elements.rating(<= C).new.exists'                        # No new classes/methods with a rating of C or worse 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
+    - 'patches.label("Unused Use Statements").new.exists'       # No new unused imports patches allowed