Upgrade expo to 51

[ianlin-bbpos]

Summary

Upgrade Expo to 51 for example-app.

Motivation

Upgrade Expo to 51 for example-app for troubleshooting the issue #744

Testing

• I tested this manually
• I added automated tests

Documentation

Select one:

• I have added relevant documentation for my changes.
• This PR does not result in any developer-facing changes.

[ianlin-bbpos]

Hey @bric-stripe, trouble you again😬. I'm working on upgrading expo and met a issue of building on ios. Base on the latest expo, I also upgraded the dependencies as expo requests, including react-native with the hermes-engine. first error came as

then I added this line 'pod update hermes-engine --no-repo-update' to fix. but it cause current issue as

I've tried several way to try to fix it, like changing Podfile to set 'use_modular_headers!' or use :modular_headers => true for 'DoubleConversion' , but there is no lucky. Have you seen such a error before and had experiences to fix it ? Please take a look when you get a chance, thanks~.

[ianlin-bbpos]

update: I found a workaround that set use_frameworks! :linkage => :static in Podfile, and it works.