fix(clerk-expo): Use atob polyfill when using Hermes JS engine

[desiprisg]

Description

Use a polyfill for the atob function to prevent errors when using the Hermes JS engine, since the engine's implementation is stricter than it should be and errors when the publishable key's base64 encoded part's length is not divisible by 4.

Related issue by the default JS engine for expo 51: facebook/hermes#1379

Checklist

• npm test runs as expected.
• npm run build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[changeset-bot]

🦋 Changeset detected

Latest commit: 7e206ff

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@clerk/clerk-expo	Patch

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[nikosdouvlis]

Can we detect the expo version used and polyfil for >51?

[desiprisg]

Opted in checking for hermes and only applying the polyfill in that case. https://reactnative.dev/docs/hermes#confirming-hermes-is-in-use

[fredrikburmester]

Just adding a comment to say that I got this error when using "@clerk/clerk-expo": "^1.0.7", in Expo 51.

 ERROR  Error: Not a valid base64 encoded string length

This error is located at:
    in ClerkProvider (created by RootLayout)

This PR seems to have solved my issue. Thanks!

[desiprisg]

!snapshot

[clerk-cookie]

Hey @desiprisg - the snapshot version command generated the following package versions:

Package	Version
@clerk/clerk-expo	1.0.8-snapshot.v7e206ff
gatsby-plugin-clerk	5.0.0-beta.45

Tip: Use the snippet copy button below to quickly install the required packages.
@clerk/clerk-expo

npm i @clerk/clerk-expo@1.0.8-snapshot.v7e206ff --save-exact

gatsby-plugin-clerk

npm i gatsby-plugin-clerk@5.0.0-beta.45 --save-exact

[anagstef]

💯