build error
```
Error:Execution failed for task ':app:transformClassesWithDexForMyketRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/mikepenz/iconics/view/IconicsButton;
```