Update http2.go
Update http2.go

use fasthttp
coooold/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,swoole/swoole-src,LinkedDestiny/swoole-src,yangchaogit/swoole-src,yangchaogit/swoole-src,AJSoft/swoole-src,tutanhamon/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,AJSoft/swoole-src,LinkedDestiny/swoole-src,LinkedDestiny/swoole-src,redoufu/swoole,swoole/swoole-src,tutanhamon/swoole-src,coooold/swoole-src,AJSoft/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,swoole/swoole-src,LinkedDestiny/swoole-src,LinkedDestiny/swoole-src,yangchaogit/swoole-src,coooold/swoole-src,coooold/swoole-src,AJSoft/swoole-src,swoole/swoole-src,redoufu/swoole,swoole/swoole-src,redoufu/swoole,swoole/swoole-src,LinkedDestiny/swoole-src,tutanhamon/swoole-src