Testrail-api

* add_attachment_to_plan
* add_attachment_to_plan_entry
* add_attachment_to_run (thank sshink )
* get_attachments_for_plan
* get_attachments_for_plan_entry
* get_attachments_for_run

What's Changed
* Get test case statuses 108 by tolstislon in https://github.com/tolstislon/testrail-api/pull/109


**Full Changelog**: https://github.com/tolstislon/testrail-api/compare/1.13.1...1.13.2

What's Changed
* Security depends by tolstislon in https://github.com/tolstislon/testrail-api/pull/107
* [Black vulnerable to Regular Expression Denial of Service (ReDoS)](https://github.com/tolstislon/testrail-api/security/dependabot/2)
* [Requests `Session` object does not verify requests after making first request with verify=False](https://github.com/tolstislon/testrail-api/security/dependabot/3)


**Full Changelog**: https://github.com/tolstislon/testrail-api/compare/1.13.0...1.13.1

Deprecations
* Removed python 3.7 103

Feature
* Added session parameter 93 (thank cpcp71)
* Keyword arguments 102

Endpoints
* Added Roles API methods 99
* Added Groups API methods 101
* Added Variables API methods 104
* Added Datasets API methods 105

Fixes
* Fixed get_users 94 (thank haley3 )
* Fixed Unintended leak of Proxy-Authorization header in requests [alert](https://github.com/tolstislon/testrail-api/security/dependabot/1)

Other
* Updated requirements
* Added publish github workflow
* Added python 3.12