chore: update changelog

Author: gadomski

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 
 - Relaxed upper bound on PySTAC dependency [#144](https://github.com/stac-utils/pystac-client/pull/144)
+- Bumped PySTAC dependency to >= 1.4.0 [#147](https://github.com/stac-utils/pystac-client/pull/147)
 
 ## [v0.3.2] - 2022-01-11