Use new Scrutinizer-CI analyser

Also disabling some build failing conditions that were causing confusing
instead of helping.

.scrutinizer.yml

 build:
-    environment:
-        php:
-            version: 7.1
+    nodes:
+        analysis:
+            environment:
+                php:
+                    version: 7.1
+            cache:
+                disabled: false
+                directories:
+                    - ~/.composer/cache
+
+            project_setup:
+                override: true
+            tests:
+                override:
+                    - php-scrutinizer-run
 
 before_commands:
-    - "composer install --no-dev --prefer-source"
+    - "composer install --no-dev --prefer-source -a"
 
 tools:
     external_code_coverage:
@@ -16,8 +28,6 @@ filter:
 
 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
-    - 'patches.label("Doc Comments").new.exists'                # No new doc comments patches allowed
     - 'patches.label("Unused Use Statements").new.exists'       # No new unused imports patches allowed