chore: bump version to 2.2.0

CHANGELOG.md

 # CHANGELOG
 
+## Version 2.2.0 (2022-01-05)
+### 👷 Bug fixes
+
+- replace members.all by members.list (member.all is deprecated)
+
 ## Version 2.1.0 (2021-10-28)
 ### 🎉 New features
 

setup.py

@@ -34,7 +34,7 @@ setup(
     name="assignbot",
     author="Logilab",
     author_email="contact@logilab.fr",
-    version="2.1.0",
+    version="2.2.0",
     licence="LGPL",
     python_requires=">=3.6",
     classifiers=[