Add httpate.Key(string) helper for static keys (#45)

Useful to create compounds with a custom prefix

Introduce RespondOnLimit() vs. OnLimit() (#44)

Export RateLimiter type (#43)

So users pass *http.RateLimiter (or save in their server struct) and use
the new .OnLimit() feature from #42.

Implement rate-limiting from HTTP handler (e.g. by request payload) (#42

)

README: Fix typo

Local counter: Don't re-allocate maps in Go 1.21+ (#40)

localCounter: Add more robust table-driven tests (#35)

Add tests for X-RateLimit-* headers, Fix X-RateLimit-Remaining header (…

…#28)

* Add tests for X-RateLimit-* headers

* Fix X-RateLimit-Remaining header

Merge pull request #23 from LukasJenicek/override_limit

pass request limit through context

Add IncrementBy (#21)