Revert "Bump omniauth from 1.9.2 to 2.0.0"

[kevinodotnet]

Reverts #59

Auth failures in production:

I, [2023-02-26T14:15:17.268137 #1]  INFO -- : [b1e22074-0cee-4739-af94-6d3c2f1cb939] Started POST "/users/auth/twitter" for 192.168.90.1 at 2023-02-26 14:15:17 +0000
D, [2023-02-26T14:15:17.268697 #1] DEBUG -- omniauth: (twitter) Request phase initiated.
W, [2023-02-26T14:15:17.269605 #1]  WARN -- omniauth: Attack prevented by OmniAuth::AuthenticityTokenProtection
E, [2023-02-26T14:15:17.269702 #1] ERROR -- omniauth: (twitter) Authentication failure! authenticity_error: OmniAuth::AuthenticityError, Forbidden
I, [2023-02-26T14:15:17.270628 #1]  INFO -- : [b1e22074-0cee-4739-af94-6d3c2f1cb939] Processing by Users::OmniauthCallbacksController#failure as HTML
I, [2023-02-26T14:15:17.270704 #1]  INFO -- : [b1e22074-0cee-4739-af94-6d3c2f1cb939]   Parameters: {"authenticity_token"=>"[FILTERED]"}
I, [2023-02-26T14:15:17.272136 #1]  INFO -- : [b1e22074-0cee-4739-af94-6d3c2f1cb939] Redirected to https://v2.ottwatch.ca/
I, [2023-02-26T14:15:17.272369 #1]  INFO -- : [b1e22074-0cee-4739-af94-6d3c2f1cb939] Completed 302 Found in 2ms (ActiveRecord: 0.0ms | Allocations: 227)
I, [2023-02-26T14:15:17.288223 #1]  INFO -- : [4ed3a3e8-3900-4ec6-986c-8f8627beebd7] Started GET "/" for 192.168.90.1 at 2023-02-26 14:15:17 +0000
I, [2023-02-26T14:15:17.289595 #1]  INFO -- : [4ed3a3e8-3900-4ec6-986c-8f8627beebd7] Processing by HomeController#index as HTML
I, [2023-02-26T14:15:18.005018 #1]  INFO -- : [4ed3a3e8-3900-4ec6-986c-8f8627beebd7]   Rendered home/index.html.erb within layouts/application (Duration: 713.0ms | Allocations: 10668)
I, [2023-02-26T14:15:18.010203 #1]  INFO -- : [4ed3a3e8-3900-4ec6-986c-8f8627beebd7]   Rendered layout layouts/application.html.erb (Duration: 718.2ms | Allocations: 11424)
I, [2023-02-26T14:15:18.011404 #1]  INFO -- : [4ed3a3e8-3900-4ec6-986c-8f8627beebd7] Completed 200 OK in 722ms (Views: 29.2ms | ActiveRecord: 690.9ms | Allocations: 11828)