Bump to 2.17.0

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+// Add your changes here and then delete this line
+
+## [2.17.0] - 2021-02-28
+
 ### Changed
 
 - moved os.remove(session_cache_path()) inside try block to avoid TypeError on app.py example file