fix: return new instance of Finder for each use

fix #35

Author: Boris Vujicic

src/LibraryStarterKit/Setup.php

@@ -91,7 +91,7 @@ public function getFilesystem(): Filesystem
      */
     public function getFinder(): Finder
     {
-        return $this->finder;
+        return $this->finder::create();
     }
 
     /**

tests/LibraryStarterKit/SetupTest.php

@@ -42,6 +42,7 @@ public function setUp(): void
 
         /** @var Finder & MockInterface $finder */
         $finder = $this->mockery(Finder::class);
+        $finder->shouldReceive('create')->andReturn(clone $finder);
 
         $project = new Project('a-project-name', $this->appPath);