Update packages to resolve dependency conflicts after vulnerabilities.

build-utils/loadPresets.js

@@ -1,4 +1,4 @@
-const webpackMerge = require('webpack-merge');
+const { merge } = require('webpack-merge');
 
 const loadPresets = (env = { presets: [] }) => {
   const presets = env.presets || [];
@@ -8,7 +8,7 @@ const loadPresets = (env = { presets: [] }) => {
     return require(`./presets/webpack.${presetName}`)(env);
   });
 
-  return webpackMerge({}, ...mergedConfigs);
+  return merge({}, ...mergedConfigs);
 };
 
 module.exports = loadPresets;

build-utils/webpack.development.js

@@ -11,7 +11,9 @@ module.exports = () => ({
   },
   plugins: [
     // Copy empty ServiceWorker so install doesn't blow up
-    new CopyWebpackPlugin(['src/sw.js'])
+    new CopyWebpackPlugin({
+      patterns: ['src/sw.js']
+    })
   ],
   devtool: 'source-map'
 });