Mailmerge

What's Changed
* Add XOAUTH2 authentication by robstewart57 in https://github.com/awdeorio/mailmerge/pull/152
* Load system default SSL cert by awdeorio in https://github.com/awdeorio/mailmerge/pull/155

New Contributors
* robstewart57 made their first contribution in https://github.com/awdeorio/mailmerge/pull/152

**Full Changelog**: https://github.com/awdeorio/mailmerge/compare/2.2.2...2.2.3

What's Changed
* Fix tox config for pydocstyle by awdeorio in https://github.com/awdeorio/mailmerge/pull/140
* Change mimetype to support inline images in thunderbird by philpagel in https://github.com/awdeorio/mailmerge/pull/144
* Drop Python 3.6 from CI by awdeorio in https://github.com/awdeorio/mailmerge/pull/148
* Adds support for tabs and semicolons as delimiters by abtsousa in https://github.com/awdeorio/mailmerge/pull/147
* PLAIN security mode by piotrsz in https://github.com/awdeorio/mailmerge/pull/139

New Contributors
* philpagel made their first contribution in https://github.com/awdeorio/mailmerge/pull/144
* abtsousa made their first contribution in https://github.com/awdeorio/mailmerge/pull/147
* piotrsz made their first contribution in https://github.com/awdeorio/mailmerge/pull/139

**Full Changelog**: https://github.com/awdeorio/mailmerge/compare/2.2.1...2.2.2

What's Changed
* Refactor test mocking by awdeorio in https://github.com/awdeorio/mailmerge/pull/128
* GitHub Actions CI by awdeorio in https://github.com/awdeorio/mailmerge/pull/132
* Drop Python 2 Support by awdeorio in https://github.com/awdeorio/mailmerge/pull/131
* Kill a pylint exception by awdeorio in https://github.com/awdeorio/mailmerge/pull/134
* Remove sh dependency by awdeorio in https://github.com/awdeorio/mailmerge/pull/133
* Bug Fix: CSV with BOM by awdeorio in https://github.com/awdeorio/mailmerge/pull/135
* Linter updates by awdeorio in https://github.com/awdeorio/mailmerge/pull/138
* Update dependency "html5 to "html5lib" by thunderbirdtr in https://github.com/awdeorio/mailmerge/pull/136

New Contributors
* thunderbirdtr made their first contribution in https://github.com/awdeorio/mailmerge/pull/136

**Full Changelog**: https://github.com/awdeorio/mailmerge/compare/2.2.0...2.2.1