Prometheus-client

[CHANGE] Remove `choose_formatter`. `choose_formatter` only existed for v0.14.x and was deprecated in v0.14.1. https://github.com/prometheus/client_python/pull/846
[FEATURE] Support TLS auth when using push gateway with `tls_auth_handler`. https://github.com/prometheus/client_python/pull/841
[ENHANCEMENT] Add `sum`, `livemin`, and `livemax` multiprocess modes for `Gauge`s. https://github.com/prometheus/client_python/pull/794

[BUGFIX] Revert `choose_encoder` being renamed to `choose_formatter` to fix a breaking change. For the 0.14.x release cycle `choose_formatter` will still exist, but will be removed in 0.15.0. 796

[ENHANCEMENT] Continued typing improvements and coverage. 759, 771, 781
[ENHANCEMENT] Allow binding to IPv6 addresses. 657
[ENHANCEMENT] Negotiate gzip content-encoding, enabled by default. 776
[ENHANCEMENT] Allow disabling `_created` metrics via the `PROMETHEUS_DISABLE_CREATED_SERIES` environment variable. 774
[BUGFIX] Correct minor typo in exception raised when exemplar labels are too long. 773

[BUGFIX] Relax some type constraints that were too strict. 754, 755, 756, 758
[BUGFIX] Explicitly export functions with `__all__`. 757

[CHANGE] Drop support for Python versions 2.7, 3.4, and 3.5. 718
[FEATURE] Support adding labels when using `.time()` 730
[ENHANCEMENT] Begin to add type hints to functions. 705
[ENHANCEMENT] Improved go-to-declaration behavior for editors. 747
[BUGFIX] Remove trailing slashes from pushgateway URLS. 722
[BUGFIX] Catch non-integer bucket/count values. 726

[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