Update mysql2 requirement from ^3.6.5 to ^3.11.3

Updates the requirements on [mysql2](https://github.com/sidorares/node-mysql2) to permit the latest version.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.6.5...v3.11.3)

---
updated-dependencies:
- dependency-name: mysql2
  dependency-type: direct:production
...

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

package.json

@@ -21,7 +21,7 @@
     "home automation"
   ],
   "optionalDependencies": {
-    "mysql2": "^3.6.5",
+    "mysql2": "^3.11.3",
     "pg": "^8.11.3",
     "sqlite3": "^5.1.6",
     "mssql": "^10.0.1"