chore(package): update ejs to version 2.5.2

https://greenkeeper.io/

package.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "canvas": "^1.3.10",
     "crc": "~3.4.0",
-    "ejs": "^2.3.4",
+    "ejs": "^2.5.2",
     "lwip": "~0.0.8",
     "mime": "~1.3.4",
     "node-df": "crafatar/node-df",