Add changelog and update version number (optimizely#446)

Co-authored-by: Paul V Craven <[email protected]>

CHANGELOG.md -> Added section for version 5.1.0 version.py -> Updated…

… version to 5.1.0 (optimizely#441)

changelog, version (optimizely#437)

[FSSDK-8583] chore: prepare for 5.0 (optimizely#431)

* bump version
* update supported version
* run unit tests on 3.12, pypy 3.8 and 3.9
* fix license

[FSSDK-9107] Update changelog and version for advanced audience targe…

…ting (optimizely#425)

* Update changelog and version for advanced audience targeting

* PR fixes

* PR fixe for version

* update date

[FSSDK-8954] chore: prep 4.1.1 (optimizely#422)

* [FSSDK-8954] docs: change full stack to feature experimentation (optimizely#420)

* [FSSDK-8954] chore: prep for 4.1.1 release (optimizely#421)

prep for 4.1.0 release

chore: prepare for release 4.0.0 (optimizely#372)

* changelogs updated

* PRs reordered in changelog

* date updated

* chore: Prepare for release 4.0.0 (optimizely#374)

* chore: Prepare for release 4.0.0

* Fix typo

* chore: bump version.py

Co-authored-by: Matjaz Pirnovar <[email protected]>
Co-authored-by: John Nguyen <[email protected]>

chore: Prepare for 3.10.0 Release (optimizely#359)

Summary
-------
-  Prepare for 3.10.0 Release

Chore(release): Prepare for v3.9.1 release (optimizely#349)

* chore(release): Preparing for 3.9.1 release

* Bump version to 3.9.1.

* Update changelog to reflect impression event fix and PR.