Sandroisu

Same problem when rotating image

When I rotating CropImageView with 5 degree my app crashing) `java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed at android.graphics.Canvas.checkValidClipOp(Canvas.java:853) at android.graphics.Canvas.clipRect(Canvas.java:876) at com.canhub.cropper.CropOverlayView.drawBackground(CropOverlayView.kt:676) at com.canhub.cropper.CropOverlayView.onDraw(CropOverlayView.kt:618) at android.view.View.draw(View.java:22350)...

I can create a pull request to fix this