Update changelog for 1.20.0 release

dbkegley · dbkegley · commit cf45711ca8b6 · 2023-09-11T12:10:29.000-04:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [1.20.0] - 2023-09-11
+
 ### Fixed
 - Python virtualenvs are now detected in Windows environments, and are automatically
   excluded from the uploaded bundle.
