Update Scrutinizer config

Author: scheb

.scrutinizer.yml

@@ -3,19 +3,9 @@ filter:
 build:
     environment:
         php:
-            version: 7.2
-checks:
-    php:
-        code_rating: true
-        duplication: true
+            version: 7.4
+    tests:
+        override:
+            - php-scrutinizer-run
 tools:
     external_code_coverage: true
-    php_mess_detector: true
-    php_cpd: true
-    php_code_sniffer:
-        config:
-            standard: PSR2
-    php_pdepend: true
-    php_analyzer: true
-    php_loc: true
-    sensiolabs_security_checker: true