docs: update changelog

Author: mrmlnc

CHANGELOG.md

@@ -32,6 +32,12 @@ Changelog entries are classified using the following labels _(from [keep-a-chang
 
 </details>
 
+## 2.2.2 (2020-03-21)
+
+### Fixed
+
+* Correctly handle parts of the pattern after parentheses in the `scan` method ([e15b920](https://github.com/micromatch/picomatch/commit/e15b920)).
+
 ## 2.2.1 (2020-01-04)
 
 * Fixes [#49](https://github.com/micromatch/picomatch/issues/49), so that braces with no sets or ranges are now propertly treated as literals.