Bump ejs from 2.5.7 to 3.1.3

Bumps [ejs](https://github.com/mde/ejs) from 2.5.7 to 3.1.3.
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/master/CHANGELOG.md)
- [Commits](mde/ejs@v2.5.7...v3.1.3)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -14,7 +14,7 @@
     "cors": "^2.8.5",
     "db-migrate": "^0.11.5",
     "db-migrate-mysql": "^1.1.10",
-    "ejs": "^2.7.4",
+    "ejs": "^3.1.3",
     "email-templates": "^7.0.5",
     "express": "^4.17.1",
     "formidable": "^1.2.2",