Support aioboto3 9.2.2

Thanks to @andrewleech for the contribution. This updates dependencies and adds support for aioboto3 9.2.2
Related: #17

v2.0.0

Fix #15

v1.0.0

• Allow admins to delete any user
• Refactoring

0.3.0

Allow admins to change other users' profiles with admin_update_profile.
admin_update_profile now takes an optional username attribute.

0.2.5

Fixed session management somewhat to prevent 'session has been closed' errors