fixup! fixup! Bump all deps and CI; Fix Elixir 1.20 warnings

Author: fhunleth

.github/workflows/ci.yml

@@ -15,7 +15,6 @@ jobs:
           - { otp: '26', elixir: '1.15' }
           - { otp: '25', elixir: '1.14' }
           - { otp: '25', elixir: '1.13' }
-          - { otp: '24', elixir: '1.12' }
         os:
           - name: Linux
             runner: ubuntu-latest