Update version and changelog for 4.6.0 (#1990)

Author: aldas

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Changelog
 
+## v4.6.0 - 2021-09-20
+
+Introduced a new [request logger](https://github.com/labstack/echo/blob/master/middleware/request_logger.go) middleware 
+to help with cases when you want to use some other logging library in your application.
+
+**Fixes**
+
+* fix timeout middleware warning: superfluous response.WriteHeader [#1905](https://github.com/labstack/echo/issues/1905)
+
+**Enhancements**
+
+* Add Cookie to KeyAuth middleware's KeyLookup [#1929](https://github.com/labstack/echo/pull/1929)
+* JWT middleware should ignore case of auth scheme in request header [#1951](https://github.com/labstack/echo/pull/1951)
+* Refactor default error handler to return first if response is already committed [#1956](https://github.com/labstack/echo/pull/1956)
+* Added request logger middleware which helps to use custom logger library for logging requests. [#1980](https://github.com/labstack/echo/pull/1980)
+* Allow escaping of colon in route path so Google Cloud API "custom methods" could be implemented [#1988](https://github.com/labstack/echo/pull/1988)
+
 ## v4.5.0 - 2021-08-01
 
 **Important notes**

echo.go

@@ -241,7 +241,7 @@ const (
 
 const (
 	// Version of Echo
-	Version = "4.5.0"
+	Version = "4.6.0"
 	website = "https://echo.labstack.com"
 	// http://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Echo
 	banner = `