Migrated Core/ReactNativeVersion to use export syntax. (#48853)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48853

## Motivation
Modernising the react-native codebase to allow for ingestion by modern Flow tooling.

## This diff
- Updates the `ReactNativeVersion` template to use `export` syntax.
- Regenerates the `ReactNativeVersion.js` file with the new template.
- Updates jest mock.
- Updates the public API snapshot *(intented breaking change)*

Changelog: [Internal]

Reviewed By: robhogan

Differential Revision: D68492723

fbshipit-source-id: daa55d3d553aca562cf2e091cd24546681a8db2f

packages/react-native/Libraries/Core/ReactNativeVersion.js

@@ -8,7 +8,7 @@
  * @generated by scripts/releases/set-version.js
  */
 
-const version: $ReadOnly<{
+export const version: $ReadOnly<{
   major: number,
   minor: number,
   patch: number,
@@ -19,5 +19,3 @@ const version: $ReadOnly<{
   patch: 0,
   prerelease: null,
 };
-
-module.exports = {version};

packages/react-native/Libraries/Core/__tests__/ReactNativeVersionCheck-test.js

@@ -118,6 +118,7 @@ function _defineCheckVersionTests() {
 
 function _mockJsVersion(major = 0, minor = 0, patch = 0, prerelease = null) {
   jest.doMock('../ReactNativeVersion', () => ({
+    __esModule: true,
     version: {major, minor, patch, prerelease},
   }));
 }

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

@@ -4434,13 +4434,12 @@ declare export default typeof ReactFiberErrorDialog;
 `;
 
 exports[`public API should not change unintentionally Libraries/Core/ReactNativeVersion.js 1`] = `
-"declare const version: $ReadOnly<{
+"declare export const version: $ReadOnly<{
   major: number,
   minor: number,
   patch: number,
   prerelease: string | null,
 }>;
-declare module.exports: { version: version };
 "
 `;
 

scripts/releases/__tests__/__snapshots__/set-rn-artifacts-version-test.js.snap

@@ -11,7 +11,7 @@ exports[`updateReactNativeArtifacts should set nightly version: packages/react-n
  * << GENERATED >>
  */
 
-const version: $ReadOnly<{
+export const version: $ReadOnly<{
   major: number,
   minor: number,
   patch: number,
@@ -22,8 +22,6 @@ const version: $ReadOnly<{
   patch: 0,
   prerelease: 'nightly-29282302-abcd1234',
 };
-
-module.exports = {version};
 "
 `;
 
@@ -136,7 +134,7 @@ exports[`updateReactNativeArtifacts should set release version: packages/react-n
  * << GENERATED >>
  */
 
-const version: $ReadOnly<{
+export const version: $ReadOnly<{
   major: number,
   minor: number,
   patch: number,
@@ -147,8 +145,6 @@ const version: $ReadOnly<{
   patch: 0,
   prerelease: null,
 };
-
-module.exports = {version};
 "
 `;
 

scripts/releases/templates/ReactNativeVersion.js-template.js

@@ -23,7 +23,7 @@ module.exports = ({version} /*: {version: Version} */) /*: string */ => `/**
  * ${'@'}generated by scripts/releases/set-version.js
  */
 
-const version: $ReadOnly<{
+export const version: $ReadOnly<{
   major: number,
   minor: number,
   patch: number,
@@ -36,6 +36,4 @@ const version: $ReadOnly<{
     version.prerelease != null ? `'${version.prerelease}'` : 'null'
   },
 };
-
-module.exports = {version};
 `;