Resolve breaking changes due to changed export namespace of jest-diff

Author: eps1lon

fixtures/dom/src/toWarnDev.js

@@ -1,7 +1,7 @@
 // copied from scripts/jest/matchers/toWarnDev.js
 'use strict';
 
-const jestDiff = require('jest-diff').default;
+const {diff: jestDiff} = require('jest-diff');
 const util = require('util');
 
 function shouldIgnoreConsoleError(format, args) {

fixtures/legacy-jsx-runtimes/setupTests.js

@@ -5,7 +5,7 @@
 
 const expect = global.expect;
 
-const jestDiff = require('jest-diff').default;
+const {diff: jestDiff} = require('jest-diff');
 const util = require('util');
 
 function shouldIgnoreConsoleError(format, args) {

scripts/jest/matchers/toWarnDev.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const jestDiff = require('jest-diff').default;
+const {diff: jestDiff} = require('jest-diff');
 const util = require('util');
 const shouldIgnoreConsoleError = require('../shouldIgnoreConsoleError');