fix(app, expo): Support RN 0.68 Obj-C++ AppDelegate

[barthap]

Description

Expo SDK 45 will be based on React Native 0.68, which has AppDelegate written in Objective-C++ (Renamed AppDelegate.m -> AppDelegate.mm). The file content changes are fortunately insignificant for us.

• Bumped @expo/config-plugins to 4.1.1 which already supports Objective-C++ App delegates (commit)
• The only significant change in the plugin code: if (language === 'objc') changed to if (['objc', 'objcpp'].includes(language))
• Rest of the PR are the tests - did a small refactor and added some tests to check proper language support.

Hopefully no more changes are required for plugins to work with upcoming SDK 45, but I'll keep an eye on it

Release Summary

• Expo iOS plugin now supports React Native 0.68 Objective-C++ AppDelegate.mm and SDK 45.

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

Unit tests pass (yarn tests:jest)

[vercel]

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Name	Status	Preview	Updated
react-native-firebase	✅ Ready (Inspect)	Visit Preview	Apr 25, 2022 at 1:23PM (UTC)

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[codecov]

Codecov Report

Merging #6213 (62b52d6) into main (f0adecc) will increase coverage by 0.06%.
The diff coverage is 85.72%.

❗ Current head 62b52d6 differs from pull request most recent head a27e7a0. Consider uploading reports for the commit a27e7a0 to get more accurate results

@@             Coverage Diff              @@
##               main    #6213      +/-   ##
============================================
+ Coverage     52.92%   52.97%   +0.06%     
  Complexity      622      622              
============================================
  Files           208      208              
  Lines         10220    10221       +1     
  Branches       1626     1625       -1     
============================================
+ Hits           5408     5414       +6     
+ Misses         4558     4553       -5     
  Partials        254      254              

[mikehardy]

This looks great to me! I really appreciate the ongoing help @barthap - no way I could keep up with Expo too at the moment, but I'm impressed they're adopting 0.68+ so quickly after being stuck on 0.64 so long! Good to see

[mikehardy]

I'm marking the PR as a "fix" semantic-release type, so I can kick out a patch-release and get it out there post-merge 🚀