Bring back webpack resolve config

addons/xterm-addon-ligatures/webpack.config.js

@@ -27,5 +27,21 @@ module.exports = {
     library: addonName,
     libraryTarget: 'umd'
   },
-  mode: 'production'
+  mode: 'production',
+  externals: {
+    'fs': 'fs',
+    'path': 'path',
+    'stream': 'stream',
+    'util': 'util'
+  },
+  resolve: {
+    // The ligature modules contains fallbacks for node environments, we never want to browserify them
+    fallback: {
+      fs: false,
+      os: false,
+      path: false,
+      stream: false,
+      util: false
+    }
+  }
 };