I added an option to concards that lists all the files that contain flashcards. This is useful if you run flashcards on a folder and want to see which files in that folder actually contain cards.
There is now an 's' keybinding available while reviewing cards. This shows some stats about the current card, such as how many times it has been reviewed.
I changed the card ordering logic. Cards that have never been passed off are now first to be reviewed. This way you can still review new cards even if you're behind. There is also a slight improvement to the sm2 algorithm for what happens if the current streak is zero.
Concards now relies on the cobra library. Cobra can handle flag only based CLIs, where as the previous argparse library couldn't.
And finally, Concards has go's module support now, so it can both have stable branch builds and run on go 1.16+ now.