fix(package): update ejs to version 3.0.2

Closes #258

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "connect-multiparty": "^2.0.0",
     "cookie-parser": "^1.4.3",
     "crypto": "0.0.3",
-    "ejs": "^2.5.5",
+    "ejs": "^3.0.2",
     "express": "^4.14.0",
     "is-image": "^1.0.1",
     "jsonschema": "^1.1.1",