Update example version of xterm.js.

examples/terminal/package.json

@@ -12,7 +12,7 @@
     "jupyter-js-services": "^0.18.0",
     "jupyterlab": "file:../..",
     "phosphor": "^0.6.0",
-    "xterm": "^1.0.0"
+    "xterm": "^1.1.3"
   },
   "devDependencies": {
     "css-loader": "^0.23.1",