broken integration with fasthttp

[pablolagos]

Recent changes in fashttp broke the integration with http2

See: https://github.com/valyala/fasthttp/pull/1602/files

package main

import (
    "github.com/valyala/fasthttp"
    "github.com/dgrr/http2"
)

func main() {
    s := &fasthttp.Server{
        Handler: yourHandler,
        Name:    "HTTP2 test",
    }

    http2.ConfigureServer(s, http2.ServerConfig{})

    s.ListenAndServeTLS(...)
}

Results in:

/go/pkg/mod/github.com/dgrr/http2@v0.3.5/configure.go:70:16: cannot use cl.Do (value of type func(req *fasthttp.Request, res *fasthttp.Response) (err error)) as fasthttp.RoundTripper value in assignment: func(req *fasthttp.Request, res *fasthttp.Response) (err error) does not implement fasthttp.RoundTripper (missing method RoundTrip)

[dgrr]

It is sad. I accept PRs if you are willing to contribute. Thanks

[pablolagos]

I will!