MIME registry is coming to Crystal's stdlib

[straight-shoota]

I want to give a heads up: MIME database API has been merged into Crystal's standard library and will probably be included in the next release. See crystal-lang/crystal#5765 for details.

This would make this shard obsolete for some of its use cases now covered by the stdlib implementation.
The MIME sniffing is not part of the standard library and I don't expect it to be added later. This would be a great feature provided by a shard like this.