[FEATURE] Exemplar support (excludes multiprocess) #669
[ENHANCEMENT] Add support for Python 3.10 #706
[ENHANCEMENT] Restricted Registry will handle metrics added after restricting #675, #680
[ENHANCEMENT] Raise a more helpful error if a metric is not observable #666
[BUGFIX] Fix instance_ip_grouping_key not working on MacOS #687
[BUGFIX] Fix assertion error from favicion.ico with Python 2.7 #715