fix: adjust tests as webpack 5 will no longer emit files for builds with errors

Author: jantimon

spec/basic.spec.js

@@ -165,6 +165,9 @@ describe('HtmlWebpackPlugin', () => {
   it('should pass through loader errors', done => {
     testHtmlPlugin({
       mode: 'production',
+      optimization: {
+        emitOnErrors: true
+      },
       entry: {
         app: path.join(__dirname, 'fixtures/index.js')
       },
@@ -2021,6 +2024,9 @@ describe('HtmlWebpackPlugin', () => {
         path: OUTPUT_DIR,
         filename: 'index_bundle.js'
       },
+      optimization: {
+        emitOnErrors: true
+      },
       plugins: [
         new HtmlWebpackPlugin({
           inject: true,