Update changelog

Author: ali-abrar

ChangeLog.md

@@ -2,7 +2,7 @@
 
 This project's release branch is `master`. This log is written from the perspective of the release branch: when changes hit `master`, they are considered released.
 
-## Unreleased
+## v0.9.1.0
 
 * Add a partial preview of GHC 8.10 support, not on by default.
   * native: linux and macOS