devel/bingo: Update to more recent snapshot

Deprecate the port as well. The author has abandoned this project
and is now helping with the development of gopls.

Changes: https://github.com/saibing/bingo/compare/ea0a232011dae8376468035f1e3ebc46d23bc9c0...76bcd777316dde1684ff59793f695e4337c0e62a