[REQ] badge for SourceForge

[forart]

It would be useful to add "standard" badges (license, language, last commit, etc.) generation for SF too.

Example (JSON here):

Data field	Suggested build-URL	Proposed badge
License [id]	https://badgen.net/sourceforge/license:1/scorchcrafter
Language [id]	https://badgen.net/sourceforge/language:1/scorchcrafter
Status	https://badgen.net/sourceforge/status/scorchcrafter
Last update	https://badgen.net/sourceforge/last-update/scorchcrafter

Hope that inspires !

[amio]

Nice.

PS, this repo is just for the badge generator library, we should add this to the https://github.com/badgen/badgen.net repo