ast: replace UglifyJsPlugin with TerserPlugin

if a module requires uglify-js-plugin, replace it with a require for terser-webpack-plugin

Author: abenezerabebe

packages/migrate/uglifyJsPlugin/__snapshots__/uglifyJsPlugin.test.js.snap

@@ -78,7 +78,7 @@ exports[`uglifyJsPlugin transforms correctly using "uglifyJsPlugin-3" data 1`] =
 `;
 
 exports[`uglifyJsPlugin transforms correctly using "uglifyJsPlugin-4" data 1`] = `
-"const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+"const TerserPlugin = require('terser-webpack-plugin');
 module.exports = {
     devtool: 'eval',
 
@@ -110,7 +110,7 @@ module.exports = {
     optimization: {
         minimize: true,
 
-        minimizer: [new UglifyJsPlugin({
+        minimizer: [new TerserPlugin({
             sourceMap: true
         })]
     }

packages/migrate/uglifyJsPlugin/uglifyJsPlugin.ts

@@ -15,7 +15,8 @@ import { IJSCodeshift, INode } from "../types/NodePath";
  * and adds `optimization.minimize: true` to config
  *
  * If any configuration is passed to UglifyWebpackPlugin
- * plugin instantiation is moved to `optimization.minimizer`.
+ * Replaces UglifyWebpackPlugin with TerserPlugin and
+ * and moves plugin instantiation to `optimization.minimizer`.
  *
  * @param {Object} j - jscodeshift top-level import
  * @param {Node} ast - jscodeshift ast to transform
@@ -63,15 +64,15 @@ export default function(j: IJSCodeshift, ast: INode): INode {
 			* If user is using UglifyJsPlugin directly from webpack
 			* transformation must:
 			* - remove it
-			* - add require for uglify-webpack-plugin
+			* - add require for terser-webpack-plugin
 			* - add to minimizer
 			*/
 				if (pluginVariableAssignment && pluginVariableAssignment.includes("webpack")) {
-					// create require for uglify-webpack-plugin
+					// create require for terser-webpack-plugin
 					const pathRequire: INode = getRequire(
 						j,
-						"UglifyJsPlugin",
-						"uglifyjs-webpack-plugin",
+						"TerserPlugin",
+						"terser-webpack-plugin",
 					);
 					// append to source code.
 					ast
@@ -84,7 +85,7 @@ export default function(j: IJSCodeshift, ast: INode): INode {
 						"init",
 						j.identifier("minimizer"),
 						j.arrayExpression([
-							j.newExpression(j.identifier("UglifyJsPlugin"), [pluginOptions[0]]),
+							j.newExpression(j.identifier("TerserPlugin"), [pluginOptions[0]]),
 						]),
 					);
 				} else {