update code style

webpack.config.js

@@ -1,9 +1,9 @@
-const pkg = require("./package.json");
-const path = require("path");
-const webpack = require("webpack");
-const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
+const pkg = require('./package.json');
+const path = require('path');
+const webpack = require('webpack');
+const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
 
-const production = process.env.NODE_ENV === "production" || false;
+const production = process.env.NODE_ENV === 'production' || false;
 
 const banner = `clipboard.js v${pkg.version}
 https://clipboardjs.com/
@@ -11,31 +11,31 @@ https://clipboardjs.com/
 Licensed MIT © Zeno Rocha`;
 
 module.exports = {
-  entry: "./src/clipboard.js",
-  mode: "production",
+  entry: './src/clipboard.js',
+  mode: 'production',
   output: {
-    filename: production ? "clipboard.min.js" : "clipboard.js",
-    path: path.resolve(__dirname, "dist"),
-    library: "ClipboardJS",
-    globalObject: "this",
-    libraryExport: "default",
-    libraryTarget: "umd",
+    filename: production ? 'clipboard.min.js' : 'clipboard.js',
+    path: path.resolve(__dirname, 'dist'),
+    library: 'ClipboardJS',
+    globalObject: 'this',
+    libraryExport: 'default',
+    libraryTarget: 'umd',
   },
   module: {
-    rules: [{ test: /\.js$/, exclude: /node_modules/, loader: "babel-loader" }],
+    rules: [{ test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' }],
   },
   optimization: {
     minimize: production,
     minimizer: [
       new UglifyJSPlugin({
-        parallel: require("os").cpus().length,
+        parallel: require('os').cpus().length,
         uglifyOptions: {
           ie8: false,
           keep_fnames: false,
           output: {
             beautify: false,
             comments: (node, { value, type }) =>
-              type == "comment2" && value.startsWith("!"),
+              type == 'comment2' && value.startsWith('!'),
           },
         },
       }),