Do not clone cached getReport() result (to be consistent with the mai…

…n branch where we do not clone because cloning results in test failures)

src/CodeCoverage.php

@@ -136,7 +136,7 @@ public function getReport(): Directory
             $this->cachedReport = (new Builder($this->analyser()))->build($this);
         }
 
-        return clone $this->cachedReport;
+        return $this->cachedReport;
     }
 
     /**