Castling after having moved the king

Created by: Keisial

After wandering across the board, the black king went back to e8, then castled kingside.

Expected behavior: This is an illegal movement, castling is no longer allowed after having moved the king.

Identified on version 1.7

Thanks for your work on this app.

PS: I noticed you are bumping the app version on each commit, however you are not making releases, and thus it makes it look as if latest version was 1.7