v0.5.6

Highlights

This update is not that important feature-wise, however I've implemented few QOL improvements.

• There is now an update checker builtin

• All code pushed to ipadecrypt now has golangci-lint powered linting

Changelog

• 7db45e7: ci: add lint check workflow (@londek)
• 4a486ee: feat: implement update checking (@londek)