Switch to master xml2json version

Which upgrades node-expat to 2.3.17

buglabs/node-xml2json#166

Author: AlecRust

package-lock.json

@@ -32,7 +32,7 @@
     "purecss": "^0.6.2",
     "serve-favicon": "^2.4.5",
     "xml-crypto": "^0.9.0",
-    "xml2json": "^0.11.0"
+    "xml2json": "git+https://github.com/buglabs/node-xml2json.git"
   },
   "devDependencies": {
     "chai": "^3.5.0",