chore(release): Prepare version 1.1.0

Author: dborsatto

CHANGELOG.md

@@ -3,7 +3,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased](https://github.com/contentful/contentful-core.php/compare/1.0.0...HEAD)
+## [1.1.0](https://github.com/contentful/contentful-core.php/tree/1.1.0) (2018-06-06)
 
 * `Contentful\Core\Api\Location` used to provide a wrongful serialization of the longitude property. Now it correctly serializes to `lon` instead of `long`.
 * The `Contentful\Core\Log\Timer` has been deprecated and will be removed in version 2.