Fix Elixir 1.17 warning about function call without parens

[michallepicki]

In e3d2079 I've fixed a warning about invoking a function without parentheses. It shows at run-time and looks like this:

warning: using map.field notation (without parentheses) to invoke function Bamboo.TestAdapter.supports_attachments?() is deprecated, you must add parentheses instead: remote.function()
  (bamboo 2.3.0) lib/bamboo/mailer.ex:307: Bamboo.Mailer.validate_attachment_support/2
  (bamboo 2.3.0) lib/bamboo/mailer.ex:289: Bamboo.Mailer.validate_and_normalize/2
  (bamboo 2.3.0) lib/bamboo/mailer.ex:240: Bamboo.Mailer.deliver_later/3

BEGIN_COMMIT_OVERRIDE
fix: Fix Elixir 1.17 warning about function call without parens
END_COMMIT_OVERRIDE

[yordis]

Hey @doomspork, I do not have the proper permission to help folks with this repo. Could you help me with it?

[doomspork]

@yordis should be fixed! Separately, but related to related to CI (approved it to run btw), I want to work with you and @btkostner to standardize it across the org, including releases (see: https://github.com/beam-community/common-config). Hopefully reduce some of the overhead

[yordis]

I want to work with you and @btkostner to standardize it across the org

That is my intent, for sure. The owner role helps to unblock me cleaning things up to get to the final state 😄
I am trying to adopt the same workflow in Tesla.

[artkay]

Hey folks @doomspork & @yordis - I am curious when a new Bamboo release is planned? The current version has been released in January 2023 and it produces warnings in Elixir 1.17.

[doomspork]

@artkay I'm working on updating the library #668 and getting our new CI/CD process setup. There's a few dialyzer errors left to resolve and then we should be GTG!