Revert "Accept no change of coverage"

This reverts commit 04a8ddf.

Author: PowerKiKi

.scrutinizer.yml

@@ -23,5 +23,5 @@ tools:
 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
+    - '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