make a webpack.config.library.js file

Author: albertstill

packages/react-scripts/config/webpack.config.prod.js renamed to packages/react-scripts/config/webpack.config.library.js

@@ -26,7 +26,7 @@ const path = require('path');
 const chalk = require('chalk');
 const fs = require('fs-extra');
 const webpack = require('webpack');
-const config = require('../config/webpack.config.prod');
+const config = require('../config/webpack.config.library');
 const paths = require('../config/paths');
 const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');