Update ejs dependency for sailsjs (#3134)

We're getting a security vulnerability warning from GitHub for the old
version of ejs.

frameworks/JavaScript/sailsjs/package.json

@@ -7,7 +7,7 @@
   "dependencies": {
     "async": "1.5.2",
     "bluebird": "3.4.1",
-    "ejs": "2.4.2",
+    "ejs": "2.5.7",
     "handlebars": "4.0.5",
     "hiredis": "0.5.0",
     "mysql": "2.11.0",