Prepare 6.1.0-rc1 release

Author: mfn

CHANGELOG.md

@@ -1,8 +1,11 @@
 CHANGELOG
 =========
 
-[Next release](https://github.com/rebing/graphql-laravel/compare/6.0.0...master)
+[Next release](https://github.com/rebing/graphql-laravel/compare/6.1.0-rc1...master)
 --------------
+
+2020-11-27, 6.1.0-rc1
+---------------------
 ### Added
 - Support for resolver middleware [\#594 / stevelacey](https://github.com/rebing/graphql-laravel/pull/594)