Update to pug 2.0.1 to fix express fortunes test again (#3388)

They seem to use inexact versions in their dependencies and then they
release breaking updates to those dependencies.  If this happens a third
time, let's consider other options such as adding a package-lock file.

https://github.com/pugjs/pug/issues/2979

frameworks/JavaScript/express/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "express": "4.16.2",
     "body-parser": "1.18.2",
-    "pug": "2.0.0",
+    "pug": "2.0.1",
     "sequelize": "3.30.0",
     "mysql": "2.15.0",
     "mongoose": "5.0.6"