allow phpmetrics --git option

Author: flavius

src/Tools/Analyzer/PhpMetricsV2.php

@@ -20,6 +20,13 @@ public function __invoke()
             $args['report-html'] = $this->options->toFile('phpmetrics/');
             $args['report-violations'] = $this->options->toFile('phpmetrics.xml');
         }
+        if ($git = $this->config->value('phpmetrics.git')) {
+            if (is_bool($git)) {
+                $args[] = '--git';
+            } else {
+                $args['git'] = $git;
+            }
+        }
         $args[] = $this->options->getAnalyzedDirs(',');
         return $args;
     }