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

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

Deprecations

* Removed support for Python 3.5 and 3.6 73

Fixes

* Fix issue 74 - update_run_in_plan_entry 75 (thank dsayling)
* Fix issue 63 - update cases 76 (thank dsayling)
* Fix move_cases_to_section 84 (thank dsayling)

Feature
* Added response handler 73
* Add support for bulk endpoints 78 (thank dsayling)
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Many thanks to dsayling for the fact that the project continues to live

* Added custom exception retry handling (thank dsayling )