warning: using map.field notation (without parentheses) - under Elixir 1.17

[rob-vetspire]

When running tests under Elixir 1.17 with use Bamboo.Test we get the following warning printed in test log:

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:199: Bamboo.Mailer.deliver_now/4
  (bamboo 2.3.0) lib/bamboo/mailer.ex:231: Bamboo.Mailer.deliver_now!/4

Fix required in lib/bamboo/mailer.ex:

change supports_attachments?

to supports_attachments?()

[doomspork]

@rob-vetspire PRs welcome!

[tonyrud]

Looks like this was fixed here: #664