add hpp to address express vulnerability

package.json

@@ -53,6 +53,7 @@
     "gulp-minify-css": "~0.5.1",
     "helmet": "~0.9.0",
     "helmet-csp": "^0.2.3",
+    "hpp": "^0.2.0",
     "jade": "~1.8.0",
     "less": "~1.7.5",
     "less-middleware": "~2.0.1",

server/server.js

@@ -27,6 +27,7 @@ var R = require('ramda'),
     expressValidator = require('express-validator'),
     forceDomain = require('forcedomain'),
     lessMiddleware = require('less-middleware'),
+    hpp = require('hpp'),
 
     passportProviders = require('./passport-providers'),
     /**
@@ -59,6 +60,7 @@ app.use(lessMiddleware(path.join(__dirname, '/public')));
 app.use(logger('dev'));
 app.use(bodyParser.json());
 app.use(bodyParser.urlencoded({ extended: true }));
+app.use(hpp());
 app.use(expressValidator({
   customValidators: {
     matchRegex: function (param, regex) {