Bump ejs from 2.3.1 to 2.5.5

Bumps [ejs](https://github.com/mde/ejs) from 2.3.1 to 2.5.5.
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mde/ejs/compare/v2.3.1...v2.5.5)

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -944,9 +944,9 @@
       "integrity": "sha1-ag18YiHkkP7v2S7D9EHJzozQl/Q="
     },
     "ejs": {
-      "version": "2.3.1",
-      "resolved": "http://registry.npm.taobao.org/ejs/download/ejs-2.3.1.tgz",
-      "integrity": "sha1-ppfZisQB4yqZw97tksYMGbYZmn8="
+      "version": "2.5.5",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.5.5.tgz",
+      "integrity": "sha1-bvTpVOp9z1T2aq0v56pCGTLZ7Xc="
     },
     "encodeurl": {
       "version": "1.0.2",

package.json

@@ -13,7 +13,7 @@
     "body-parser": "1.12.3",
     "connect-timeout": "^1.7.0",
     "cookie-parser": "^1.3.5",
-    "ejs": "2.3.1",
+    "ejs": "2.5.5",
     "express": "4.12.3",
     "leancloud-storage": "^3.0.0",
     "leanengine": "^3.0.0",