feat(clerk-js): Update mobile request header to include Expo SDK version (#7133)

Author: chriscanin

.changeset/expo-sdk-version-header.md

@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-expo': patch
+---
+
+Add `x-expo-sdk-version` header to HTTP requests to match iOS and Android SDK patterns.

packages/expo/src/provider/singleton/createClerkInstance.ts

@@ -10,6 +10,7 @@ import type {
 } from '@clerk/types';
 import { Platform } from 'react-native';
 
+import packageJson from '../../../package.json';
 import {
   ClientResourceCache,
   DUMMY_CLERK_CLIENT_RESOURCE,
@@ -165,6 +166,7 @@ export function createClerkInstance(ClerkClass: typeof Clerk) {
         // Some iOS devices have an empty user-agent, so we can't rely on that.
         if (isNative()) {
           (requestInit.headers as Headers).set('x-mobile', '1');
+          (requestInit.headers as Headers).set('x-expo-sdk-version', packageJson.version);
         }
       });