fix(@angular-devkit/build-angular): ensure build-angular's webpack version is used

(cherry picked from commit f3a23fc)

Author: clydin

packages/angular_devkit/build_angular/src/browser/index.ts

@@ -11,7 +11,7 @@ import { join, json, logging, normalize, tags, virtualFs } from '@angular-devkit
 import { NodeJsSyncHost } from '@angular-devkit/core/node';
 import * as fs from 'fs';
 import * as path from 'path';
-import { Observable, from, of } from 'rxjs';
+import { Observable, from } from 'rxjs';
 import { concatMap, map, switchMap } from 'rxjs/operators';
 import { ScriptTarget } from 'typescript';
 import * as webpack from 'webpack';
@@ -256,6 +256,7 @@ export function buildWebpackBrowser(
       const startTime = Date.now();
 
       return runWebpack(config, context, {
+        webpackFactory: require('webpack') as typeof webpack,
         logging:
           transforms.logging ||
           (useBundleDownleveling

packages/angular_devkit/build_angular/src/extract-i18n/index.ts

@@ -131,7 +131,10 @@ async function execute(options: ExtractI18nBuilderOptions, context: BuilderConte
     }
   };
 
-  return runWebpack(config, context, { logging }).toPromise();
+  return runWebpack(config, context, {
+    logging,
+    webpackFactory: await import('webpack'),
+  }).toPromise();
 }
 
 export default createBuilder<JsonObject & ExtractI18nBuilderOptions>(execute);

packages/angular_devkit/build_angular/src/server/index.ts

@@ -61,7 +61,9 @@ export function execute(
 
   return from(initialize(options, context, transforms.webpackConfiguration)).pipe(
     concatMap(({ config, i18n }) => {
-      return runWebpack(config, context).pipe(
+      return runWebpack(config, context, {
+        webpackFactory: require('webpack') as typeof webpack,
+      }).pipe(
         concatMap(async output => {
           const { emittedFiles = [], webpackStats } = output;
           if (!output.success || !i18n.shouldInline) {