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

Author: fhunleth

.github/workflows/ci.yml

@@ -12,9 +12,6 @@ jobs:
           - { otp: '28', elixir: '1.18' }
           - { otp: '27', elixir: '1.17' }
           - { otp: '26', elixir: '1.16' }
-          - { otp: '26', elixir: '1.15' }
-          - { otp: '25', elixir: '1.14' }
-          - { otp: '25', elixir: '1.13' }
         os:
           - name: Linux
             runner: ubuntu-latest