Aws-okta-keyman

- Fixes https://github.com/nathan-v/aws_okta_keyman/issues/64: Duo Web Failing
- Fixes https://github.com/nathan-v/aws_okta_keyman/issues/121: Use a consistent user agent
- Moves to using Black for formatting
- Adds pre-commit hooks
- Adds isort hook
- Adds testing for Python 3.10
- Corrects the supported versions list in setup.py
- Removes remaining Python. 2.x cruft
- Move to f-strings everywhere
- Start preparing for typing
- Improve/update CI
- Drops support for Python 2.7 and 3.5
- Adds support for Python 3.10

* Fix spelling errors (including https://github.com/nathan-v/aws_okta_keyman/pull/96)

* Session duration bug (https://github.com/nathan-v/aws_okta_keyman/issues/80)

* Add Okta full URL support (https://github.com/nathan-v/aws_okta_keyman/issues/65 and https://github.com/nathan-v/aws_okta_keyman/issues/82)

* Version bump

* Fix for named profiles

* Fixes a bug in how the roles were referenced during selection

* Hotfix to correct missing update to setup.py

* Support --account and --role to choose the account or role
* Update coverage to 5.2
* Entry point moved to __main__.py to make local development simpler
* Logger setup moved to __main__.py to make use of Keyman as a lib simpler
* Added PR template