Bump mysql2 from 3.9.4 to 3.9.7 in /frameworks/JavaScript/nodejs

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.9.4 to 3.9.7.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](https://github.com/sidorares/node-mysql2/compare/v3.9.4...v3.9.7)

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

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

frameworks/JavaScript/nodejs/package.json

@@ -8,7 +8,7 @@
     "mongodb": "3.7.3",
     "mongoose": "5.13.20",
     "mysql": "2.16.0",
-    "mysql2": "3.9.4",
+    "mysql2": "3.9.7",
     "parseurl": "1.3.2",
     "pg": "8.5.0",
     "pg-hstore": "2.3.2",