docs(README): update filename formatting

Author: michael-ciniawsky

README.md

@@ -33,7 +33,7 @@ npm i -D postcss-loader
 
 ### `Configuration`
 
-**postcss.config.js**
+**`postcss.config.js`**
 ```js
 module.exports = {
   parser: 'sugarss',
@@ -72,7 +72,7 @@ Config lookup starts from `path.dirname(file)` and walks the file tree upwards u
 
 After setting up your `postcss.config.js`, add `postcss-loader` to your `webpack.config.js`. You can use it standalone or in conjunction with `css-loader` (recommended). Use it **after** `css-loader` and `style-loader`, but **before** other preprocessor loaders like e.g `sass|less|stylus-loader`, if you use any.
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 module.exports = {
   module: {
@@ -88,7 +88,7 @@ module.exports = {
 
 > ⚠️  When `postcss-loader` is used standalone (without `css-loader`) don't use `@import` in your CSS, since this can lead to quite bloated bundles
 
-**webpack.config.js (recommended)**
+**`webpack.config.js` (recommended)**
 ```js
 module.exports = {
   module: {
@@ -122,6 +122,7 @@ module.exports = {
 
 If you use JS styles without the [`postcss-js`][postcss-js] parser, add the `exec` option.
 
+**`webpack.config.js`**
 ```js
 {
   test: /\.style.js$/,
@@ -148,7 +149,7 @@ You can manually specify the path to search for your config (`postcss.config.js`
 
 > ⚠️  Note that you **can't** use a **filename** other than the [supported config formats] (e.g `.postcssrc.js`, `postcss.config.js`), this option only allows you to manually specify the **directory** where config lookup should **start** from
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   loader: 'postcss-loader',
@@ -173,7 +174,7 @@ You can manually specify the path to search for your config (`postcss.config.js`
 
 `postcss-loader` exposes context `ctx` to the config file, making your `postcss.config.js` dynamic, so can use it to do some real magic ✨
 
-**postcss.config.js**
+**`postcss.config.js`**
 ```js
 module.exports = ({ file, options, env }) => ({
   parser: file.extname === '.sss' ? 'sugarss' : false,
@@ -185,7 +186,7 @@ module.exports = ({ file, options, env }) => ({
 })
 ```
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   loader: 'postcss-loader',
@@ -202,7 +203,7 @@ module.exports = ({ file, options, env }) => ({
 
 ### `Plugins`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   loader: 'postcss-loader',
@@ -229,7 +230,7 @@ module.exports = ({ file, options, env }) => ({
 
 #### `Parser`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.sss$/,
@@ -242,7 +243,7 @@ module.exports = ({ file, options, env }) => ({
 
 #### `Syntax`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css$/,
@@ -255,7 +256,7 @@ module.exports = ({ file, options, env }) => ({
 
 #### `Stringifier`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css$/,
@@ -270,7 +271,7 @@ module.exports = ({ file, options, env }) => ({
 
 Enables source map support, `postcss-loader` will use the previous source map given by other loaders and update it accordingly, if no previous loader is applied before `postcss-loader`, the loader will generate a source map for you.
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css/,
@@ -288,7 +289,7 @@ Enables source map support, `postcss-loader` will use the previous source map gi
 You can set the `sourceMap: 'inline'` option to inline the source map
 within the CSS directly as an annotation comment.
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   loader: 'postcss-loader',
@@ -308,7 +309,7 @@ within the CSS directly as an annotation comment.
 
 ### `Stylelint`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css$/,
@@ -330,9 +331,9 @@ within the CSS directly as an annotation comment.
 }
 ```
 
-### Autoprefixing
+### `Autoprefixing`
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css$/,
@@ -361,7 +362,7 @@ This loader [cannot be used] with [CSS Modules] out of the box due
 to the way `css-loader` processes file imports. To make them work properly,
 either add the css-loader’s [`importLoaders`] option.
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
 {
   test: /\.css$/,
@@ -386,6 +387,7 @@ If you want to process styles written in JavaScript, use the [postcss-js] parser
 
 [postcss-js]: https://github.com/postcss/postcss-js
 
+**`webpack.config.js`**
 ```js
 {
   test: /\.style.js$/,
@@ -425,10 +427,11 @@ export default {
 
 [ExtractPlugin]: https://github.com/webpack-contrib/mini-css-extract-plugin
 
-**webpack.config.js**
+**`webpack.config.js`**
 ```js
-const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const devMode = process.env.NODE_ENV !== 'production';
+const devMode = process.env.NODE_ENV !== 'production'
+
+const MiniCssExtractPlugin = require('mini-css-extract-plugin')
 
 module.exports = {
   module: {
@@ -438,14 +441,14 @@ module.exports = {
         use: [
           devMode ? 'style-loader' : MiniCssExtractPlugin.loader,
           'css-loader',
-          'postcss-loader',
+          'postcss-loader'
         ]
       }
     ]
   },
   plugins: [
     new MiniCssExtractPlugin({
-      filename: devMode ? '[name].css' : '[name].[hash].css',
+      filename: devMode ? '[name].css' : '[name].[hash].css'
     })
   ]
 }