build: move postcss.config.js to webpack, fix autoprefixer

postcss.config.js

@@ -1,5 +0,0 @@
-module.exports = {
-    plugins: [
-        require('autoprefixer')
-    ]
-}

webpack/dev.config.js

@@ -58,7 +58,9 @@ module.exports = {
                     {
                         loader: require.resolve('postcss-loader'),
                         options: {
-                            ident: 'postcss'
+                            config: {
+                                path: path.join(__dirname, 'postcss.config.js')
+                            }
                         }
                     },
                     require.resolve('sass-loader')

webpack/postcss.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+    plugins: {
+        'autoprefixer': {}
+    }
+};

webpack/prod.config.js

@@ -65,7 +65,9 @@ module.exports = {
                         {
                             loader: require.resolve('postcss-loader'),
                             options: {
-                                ident: 'postcss'
+                                config: {
+                                    path: path.join(__dirname, 'postcss.config.js')
+                                }
                             }
                         },
                         require.resolve('sass-loader')