[BUG]pushing done button with dragging

[sugitatestblue]

Describe the bug

I guess it is default style only.

let cropvc = TOCropViewController(croppingStyle: .default, image: originalImage)

The plugin accept pushing done button when dragging didn't finish yet.

To Reproduce
Steps to reproduce the behavior:

1. select image
2. Keep dragging
3. push Done(in Japanese, 完了) button
4. it accepts cropping with empty spacing

Expected behavior

it doesn't accepts cropping with empty spacing

Screenshots

iOS Device:

• Device: [Phone12]
• OS: [iOS15.3.1]
• Library Version [2.6.1]