Change unsubscribedFromEmails type to boolean for userAttributesForDictionary ios

[FabianTrain]

I was unable to change the intercom user attirbute unsubscribedFromEmails on iOS. It seems like there is an issue with using a string as a type. I changed the unsubscribedFromEmails type to BOOL.

This issue seems to be from the old react-native-intercom package, where it was fixed.

=> tinycreative/react-native-intercom@d777d50

[Br1an-Boyle]

Thanks @FabianTrain
You'll need to update the PR with the latest from main before you merge.

[FabianTrain]

@Br1an-Boyle Thank you for the review. I updated from main.

[tamlyn]

Thanks @FabianTrain for finding and fixing this.

For anyone else coming here, this fixed a bug in the iOS part of the Intercom React Native SDK which caused both false and true values to be interpreted as true.

For us, this meant when someone opted in to email marketing, we sent unsubscribedFromEmails: false but this resulted in the contact in Intercom being tagged with unsubscribed_from_emails: true! It started when we upgraded from v6.1.0 to v6.7.0 in March.

Fortunately we were able to fix our Intercom records by exporting analytics data from Amplitude. But it's taken over a day to identify and correct the problem, and very likely cost us lost revenue from the many hundreds of users who haven't been receiving the emails they asked for. 😞