fix(authenticator): Make onDisplayMessage not a suspending function (#33)

Author: mattcreaser

authenticator/src/main/java/com/amplifyframework/ui/authenticator/ui/Authenticator.kt

@@ -97,7 +97,7 @@ fun Authenticator(
     errorContent: @Composable (state: ErrorState) -> Unit = { AuthenticatorError(it) },
     headerContent: @Composable () -> Unit = {},
     footerContent: @Composable () -> Unit = {},
-    onDisplayMessage: (suspend (AuthenticatorMessage) -> Unit)? = null,
+    onDisplayMessage: ((AuthenticatorMessage) -> Unit)? = null,
     content: @Composable (state: SignedInState) -> Unit
 ) {
     val snackbarState = remember { SnackbarHostState() }