Update changelog

Author: Seldaek

CHANGELOG.md

@@ -3,6 +3,11 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+### [1.7.0] 2020-09-09
+
+  * Added: support for `x || @dev`, not very useful but seen in the wild and failed to validate with 1.5.2/1.6.0
+  * Added: support for `foobar-dev` being equal to `dev-foobar`, dev-foobar is the official way to write it but we need to support the other for BC and convenience
+
 ### [1.6.0] 2020-09-08
 
   * Added: support for constraints like `^2.x-dev` and `~2.x-dev`, not very useful but seen in the wild and failed to validate with 1.5.2
@@ -76,6 +81,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
     - Namespace: `Composer\Test\Package\LinkConstraint` -> `Composer\Test\Semver\Constraint`
   * Changed: code style using php-cs-fixer.
 
+[1.7.0]: https://github.com/composer/semver/compare/1.6.0...1.7.0
 [1.6.0]: https://github.com/composer/semver/compare/1.5.2...1.6.0
 [1.5.2]: https://github.com/composer/semver/compare/1.5.1...1.5.2
 [1.5.1]: https://github.com/composer/semver/compare/1.5.0...1.5.1