Add Charred

[Limess]

charred is a zero dependency Clojure baesd library which claims to be as fast as Jackson and univocity .

[Limess]

clojure.data.json would also be interesting in the Clojure ecosystem.

(the main used Clojure alternatives - https://github.com/metosin/jsonista and https://github.com/dakrone/cheshire - both use Jackson).

[fabienrenaud]

Feel free to contribute.