Update changelog

CHANGELOG.md

@@ -1,3 +1,11 @@
+### [1.7.2] 2018-08-16
+
+  * Fixed reporting of authentication/rate limiting issues for GitHub API access
+  * Fixed `create-project` not checking the checking the latest commit out when a cache was already present
+  * Fixed reporting of errors when `global` command can not switch the working directory
+  * Fixed PHP 5.3 JSON encoding issues with complex unicode character sequences
+  * Updated to latest ca-bundle and xdebug-handler projects, see related changelogs
+
 ### [1.7.1] 2018-08-07
 
   * Fixed issue autoloading plugins in require-dev in some conditions
@@ -679,6 +687,7 @@
 
   * Initial release
 
+[1.7.2]: https://github.com/composer/composer/compare/1.7.1...1.7.2
 [1.7.1]: https://github.com/composer/composer/compare/1.7.0...1.7.1
 [1.7.0]: https://github.com/composer/composer/compare/1.7.0-RC...1.7.0
 [1.7.0-RC]: https://github.com/composer/composer/compare/1.6.5...1.7.0-RC