Change build from babylon to babel (#18015)

Author: trueadm

scripts/rollup/build.js

@@ -410,7 +410,7 @@ function getPlugins(
     // Note that this plugin must be called after closure applies DCE.
     isProduction && stripUnusedImports(pureExternalModules),
     // Add the whitespace back if necessary.
-    shouldStayReadable && prettier({parser: 'babylon'}),
+    shouldStayReadable && prettier({parser: 'babel'}),
     // License and haste headers, top-level `if` blocks.
     {
       transformBundle(source) {

scripts/shared/__tests__/evalToString-test.js

@@ -7,10 +7,9 @@
 'use strict';
 
 const evalToString = require('../evalToString');
-const babylon = require('babylon');
+const parser = require('@babel/parser');
 
-const parse = source =>
-  babylon.parse(`(${source});`).program.body[0].expression; // quick way to get an exp node
+const parse = source => parser.parse(`(${source});`).program.body[0].expression; // quick way to get an exp node
 
 const parseAndEval = source => evalToString(parse(source));