chore: Resolve compile warnings -> Adjust Config to not warn in later…

[pdgonzalez872]

… Elixir versions, add missing callbacks that were warning, add oauther to list of applications

Hi @parroty! I was building a project and saw a couple of warnings. Hope this helps! Thanks for maintaining the project!

[parroty]

Thank you for the PR! I appreciate your help 🙇 .

Is it possible for you to remove the elixir 1.5 definition (L12-L13) in the actions workflow for letting the CI to pass? (assuming it's too old for using import Config).

• https://github.com/parroty/extwitter/blob/master/.github/workflows/test_and_lint.yaml#L12

Also, maybe the following line too? (to ">= 1.9.0"?)

• https://github.com/parroty/extwitter/blob/master/mix.exs#L11

[pdgonzalez872]

@parroty I think you need to manually run the workflow :(

[coveralls]

Coverage decreased (-1.6%) to 81.162% when pulling 4d9f87f6e8b43be126ff7a693a0ebdee7e2c0aeb on pdgonzalez872:pg-chores into c355bf7141f0d025bf78fc2141a7b0a025a506bc on parroty:master.

[parroty]

Thanks!