Proposals to provide encode/decode only form url body

[wingyplus]

I have working on create a client for https://developers.line.biz/en/reference/social-api/#issue-access-token. I found that the api receive a request as a form url encoded and response it as a json format. Tesla provide encode/decode only for json data format but form uri doesn't. The proposals provide 2 new middleware to do exactly the same Middleware.EncodeJson and Middleware.DecodeJson does but for Middleware.FormUrlencoded.

[teamon]

The decoding part is guarded by content type, but I agree it makes sense to have separate EncodeFormUrlencoded and DecodeFormUrlencoded middlewares. I'd be happy to accept a MR.

[wingyplus]

Thanks. Will send a PR tomorrow.