chore: publish at_auth 2.0.5

[murali-shris]

- What I did

• changes to publish at_auth - How I did it
• upgraded dependencies - at_commons and at_lookup in pubspec - How to verify it
• tests should pass

[purnimavenkatasubbu]

I have tested the at_auth changes in both the at_client and at_onboarding_cli. Onboarding Flow Register: Successfully registered a new atsign. Activation: Activated the newly registered atsign. Results: The registration and activation processes were completed without any issues. Testing Verbs Used the atsign registered and activated in the onboarding flow(Above scenario) and tested with verbs at_client functional and end2end tests Ran tests locally pointing to the trunk branch of the at_auth changes and all the tests passed successfully