Update Rollup and related plugins to their most recent versions (#24916)

Update Rollup and related plugins to their most recent versions +
resolve any breaking changes/deprecations/etc along the way. I made each
change piece by piece, so the commit history tells a pretty good story
of what was changed where/how/why.

fixes https://github.com/facebook/react/issues/24894

For the full deepdive/context, see:

- https://github.com/facebook/react/issues/24894

The inspiration for this came from @jasonwilliams 's PR for attempting
to add sourcemap output support to React's builds:

- https://github.com/facebook/react/issues/20186
  - https://github.com/facebook/react/pull/21946

But I figured that it would be useful to minimise the scope of changes
in that PR, and to modernise the build tooling along the way.

If any of these updates rely on a node version later than `10.x`, then
the following PR may have to land first, otherwise things might break on
AppVeyor:

- https://github.com/facebook/react/issues/24891
  - https://github.com/facebook/react/pull/24892

Co-authored-by: Sebastian Markbage <sebastian@calyptus.eu>

scripts/rollup/build.js

@@ -1,15 +1,15 @@
 'use strict';
 
 const rollup = require('rollup');
-const babel = require('rollup-plugin-babel');
+const babel = require('@rollup/plugin-babel').babel;
 const closure = require('./plugins/closure-plugin');
-const commonjs = require('rollup-plugin-commonjs');
+const commonjs = require('@rollup/plugin-commonjs');
 const flowRemoveTypes = require('flow-remove-types');
 const prettier = require('rollup-plugin-prettier');
-const replace = require('rollup-plugin-replace');
+const replace = require('@rollup/plugin-replace');
 const stripBanner = require('rollup-plugin-strip-banner');
 const chalk = require('chalk');
-const resolve = require('rollup-plugin-node-resolve');
+const resolve = require('@rollup/plugin-node-resolve').nodeResolve;
 const fs = require('fs');
 const argv = require('minimist')(process.argv.slice(2));
 const Modules = require('./modules');
@@ -146,6 +146,7 @@ function getBabelConfig(
     configFile: false,
     presets: [],
     plugins: [...babelPlugins],
+    babelHelpers: 'bundled',
   };
   if (isDevelopment) {
     options.plugins.push(
@@ -189,6 +190,7 @@ function getRollupOutputOptions(
     name: globalName,
     sourcemap: false,
     esModule: false,
+    exports: 'auto',
   };
 }
 
@@ -342,7 +344,7 @@ function getPlugins(
     forbidFBJSImports(),
     // Use Node resolution mechanism.
     resolve({
-      skip: externals,
+      // skip: externals, // TODO: options.skip was removed in @rollup/plugin-node-resolve 3.0.0
     }),
     // Remove license headers from individual modules
     stripBanner({
@@ -367,11 +369,14 @@ function getPlugins(
     },
     // Turn __DEV__ and process.env checks into constants.
     replace({
-      __DEV__: isProduction ? 'false' : 'true',
-      __PROFILE__: isProfiling || !isProduction ? 'true' : 'false',
-      __UMD__: isUMDBundle ? 'true' : 'false',
-      'process.env.NODE_ENV': isProduction ? "'production'" : "'development'",
-      __EXPERIMENTAL__,
+      preventAssignment: true,
+      values: {
+        __DEV__: isProduction ? 'false' : 'true',
+        __PROFILE__: isProfiling || !isProduction ? 'true' : 'false',
+        __UMD__: isUMDBundle ? 'true' : 'false',
+        'process.env.NODE_ENV': isProduction ? "'production'" : "'development'",
+        __EXPERIMENTAL__,
+      },
     }),
     // The CommonJS plugin *only* exists to pull "art" into "react-art".
     // I'm going to port "art" to ES modules to avoid this problem.
@@ -566,6 +571,7 @@ async function createBundle(bundle, bundleType) {
     treeshake: {
       moduleSideEffects: (id, external) =>
         !(external && pureExternalModules.includes(id)),
+      propertyReadSideEffects: false,
     },
     external(id) {
       const containsThisModule = pkg => id === pkg || id.startsWith(pkg + '/');
@@ -655,7 +661,7 @@ async function createBundle(bundle, bundleType) {
 
 function handleRollupWarning(warning) {
   if (warning.code === 'UNUSED_EXTERNAL_IMPORT') {
-    const match = warning.message.match(/external module '([^']+)'/);
+    const match = warning.message.match(/external module "([^"]+)"/);
     if (!match || typeof match[1] !== 'string') {
       throw new Error(
         'Could not parse a Rollup warning. ' + 'Fix this method.'