FIAM init(actionText:actionURL:)' is deprecated

[xuaninbox]

• Xcode version: 10.3
• Firebase SDK version: 6.6
• Firebase Component: FirebaseInAppMessaging
• Component version: 0.15.3

[REQUIRED] Step 3: Describe the problem

When using

InAppMessagingAction(actionText: modalMessage.actionButton?.buttonText, actionURL: actionURL)

warning says it's deprecated, I'm using customs InAppMessagingDisplay and I can't seem to find any replacement for this. Whats the best approach to fix this issue.

[christibbs]

Hey Xuan, when we deprecated the initializer for InAppMessagingAction we failed to consider the custom InAppMessagingDisplay case. We'll un-deprecate it with the next release.

[paulb777]

@christibbs Let's leave the issue open and close it with the PR that does the un-deprecation.