Compile warnings in Elixir 1.17

[ArthurClemens]

I am getting a couple of runtime warnings like this one:

using map.field notation (without parentheses) to invoke function MyApp.Repo.__adapter__() is deprecated,
you must add parentheses instead: remote.function()

This refers to this code (which is used 7 times in triplex.ex):

case repo.__adapter__ do

It would be nice to have this cleaned up.