Normalize newlines in public-api-test (#45145)

Summary:
Tests were failing on windows due to parsing CRLF line endings. This change enables the API tests for windows by normalizing line endings before parsing the file.

## Changelog:
[INTERNAL] [ADDED] - `public-api-test` now runs on Windows.

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[ANDROID|GENERAL|IOS|INTERNAL] [BREAKING|ADDED|CHANGED|DEPRECATED|REMOVED|FIXED|SECURITY] - Message

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Pull Request resolved: https://github.com/facebook/react-native/pull/45145

Test Plan: Build-time-only change; relying on CircleCI

Reviewed By: cipolleschi

Differential Revision: D59001867

Pulled By: huntie

fbshipit-source-id: a7a41945e8c93288be1d5b7b59df7f621e467657

packages/react-native/Libraries/__tests__/public-api-test.js

@@ -66,14 +66,6 @@ const sourceFiles = [
 ];
 
 describe('public API', () => {
-  if (os.platform() === 'win32') {
-    // TODO(huntie): Re-enable once upstream flow-api-translator fixes are made
-    // eslint-disable-next-line jest/no-focused-tests
-    test.only('skipping tests on win32', () => {
-      console.log('skipping tests');
-    });
-  }
-
   describe('should not change unintentionally', () => {
     test.each(sourceFiles)('%s', async (file: string) => {
       const source = await fs.readFile(path.join(PACKAGE_ROOT, file), 'utf-8');
@@ -111,6 +103,8 @@ describe('public API', () => {
 });
 
 async function translateFlowToExportedAPI(source: string): Promise<string> {
+  // Normalize newlines
+  source = source.replace(/\r\n?/g, '\n');
   // Convert to Flow typedefs
   const typeDefSource = await translate.translateFlowToFlowDef(source);