fix(package): update express-hbs to version 2.3.2

Closes #157

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "existential-default-deep": "~1.0.0",
     "exists-file": "~3.0.0",
     "express": "~4.15.2",
-    "express-hbs": "~1.0.1",
+    "express-hbs": "~2.3.2",
     "fink-is-uri": "~1.0.2",
     "fink-level": "~1.1.1",
     "helmet": "~3.5.0",