Move scrutinizer config to repository.

.scrutinizer.yml

+filter:
+    paths: [src/*]
+
+checks:
+    php:
+        remove_extra_empty_lines: true
+        remove_php_closing_tag: true
+        remove_trailing_whitespace: true
+        fix_use_statements:
+            remove_unused: true
+            preserve_multiple: false
+            preserve_blanklines: true
+            order_alphabetically: true
+        fix_php_opening_tag: true
+        fix_linefeed: true
+        fix_line_ending: true
+        fix_identation_4spaces: true
+        fix_doc_comments: true
+
 tools:
     external_code_coverage:
         timeout: 600
-
-filter:
-    paths: ["src/*"]