use postcss by config

packages/bem-react-scripts/config/webpack.config.dev.js

@@ -10,7 +10,6 @@
 // @remove-on-eject-end
 'use strict';
 
-const autoprefixer = require('autoprefixer');
 const webpack = require('webpack');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
@@ -213,22 +212,7 @@ module.exports = {
               importLoaders: 1,
             },
           },
-          {
-            loader: 'postcss-loader',
-            options: {
-              ident: 'postcss', // https://webpack.js.org/guides/migrating/#complex-options
-              plugins: () => [
-                autoprefixer({
-                  browsers: [
-                    '>1%',
-                    'last 4 versions',
-                    'Firefox ESR',
-                    'not ie < 9', // React doesn't support IE8 anyway
-                  ],
-                }),
-              ],
-            },
-          },
+          { loader: 'postcss-loader' },
         ],
       },
       // ** STOP ** Are you adding a new loader?

packages/bem-react-scripts/config/webpack.config.prod.js

@@ -10,7 +10,6 @@
 // @remove-on-eject-end
 'use strict';
 
-const autoprefixer = require('autoprefixer');
 const webpack = require('webpack');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
@@ -222,22 +221,7 @@ module.exports = {
                     importLoaders: 1,
                   },
                 },
-                {
-                  loader: 'postcss-loader',
-                  options: {
-                    ident: 'postcss', // https://webpack.js.org/guides/migrating/#complex-options
-                    plugins: () => [
-                      autoprefixer({
-                        browsers: [
-                          '>1%',
-                          'last 4 versions',
-                          'Firefox ESR',
-                          'not ie < 9', // React doesn't support IE8 anyway
-                        ],
-                      }),
-                    ],
-                  },
-                },
+                { loader: 'postcss-loader' },
               ],
             },
             extractTextPluginOptions

packages/bem-react-scripts/template/postcss.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+  plugins: [
+    require('autoprefixer')({
+      browsers: [
+        '>1%',
+        'last 4 versions',
+        'Firefox ESR',
+        'not ie < 9', // React doesn't support IE8 anyway
+      ],
+    }),
+  ],
+};