Update description for Echo. (#1216)

Signed-off-by: Vishal Rana <vr@labstack.com>

README.md

@@ -1133,7 +1133,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * [Bone](https://github.com/go-zoo/bone) - Lightning Fast HTTP Multiplexer.
 * [Bxog](https://github.com/claygod/Bxog) - Simple and fast HTTP router for Go. It works with routes of varying difficulty, length and nesting. And he knows how to create a URL from the received parameters.
 * [chi](https://github.com/pressly/chi) - Small, fast and expressive HTTP router built on net/context.
-* [Echo](https://github.com/labstack/echo) - A fast and unfancy micro web framework for Go.
+* [Echo](https://github.com/labstack/echo) - High performance, minimalist Go web framework.
 * [fasthttprouter](https://github.com/buaazp/fasthttprouter) - A high performance router forked from `httprouter`. The first router fit for `fasthttp`.
 * [Fireball](https://github.com/zpatrick/fireball) - A more "natural" feeling web framework.
 * [Florest](https://github.com/jabong/florest-core) - High-performance workflow based REST API framework