Response caching

[cbenhagen]

Please consider caching responses. This could be done one the rust side with https://github.com/06chaynes/http-cache or in dart with https://github.com/Colton127/http_cache_stream or https://github.com/rodydavis/http_get_cache.

[mertalev]

http_cache_reqwest seems like the best option and straightforward to add. It could be disabled by default and configured at the client level.