Github activity badge #66

could we get a badge showing how recent the last commit was?
Ideally going from daily -> weekly -> monthly -> yearly, i.e:

• "today"
• "yesterday"
• "x days ago"
• "x weeks ago"
• "x months ago"
• "x years ago"

shields.io and badgen have something similar, but i prefer the style of badgers.space so im making an issue.