Use specific xterm.js version as dependency

package.json

@@ -33,7 +33,7 @@
     "vscode-debugprotocol": "1.9.0",
     "vscode-textmate": "1.1.0",
     "winreg": "1.2.0",
-    "xterm": "https://github.com/sourcelair/xterm.js/tarball/master",
+    "xterm": "git+https://github.com/sourcelair/xterm.js.git#9d34ed8",
     "yauzl": "2.3.1"
   },
   "devDependencies": {