Bump ws from 6.1.0 to 7.2.3

Bumps [ws](https://github.com/websockets/ws) from 6.1.0 to 7.2.3.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@6.1.0...7.2.3)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "ejs": "~2.5.7",
     "express": "^4.16.3",
-    "ws": "^6.1.0"
+    "ws": "^7.2.3"
   },
   "eslintConfig": {
     "env": {