fix(deps): update dependency ejs to v4 (#47)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -7,7 +7,7 @@
     "start": "node index.js"
   },
   "dependencies": {
-    "ejs": "3.1.10",
+    "ejs": "4.0.1",
     "express": "4.17.3"
   },
   "engines": {