Bump winston from 3.12.0 to 3.13.0 in /server (#188)

Bumps [winston](https://github.com/winstonjs/winston) from 3.12.0 to 3.13.0.
- [Release notes](https://github.com/winstonjs/winston/releases)
- [Changelog](https://github.com/winstonjs/winston/blob/master/CHANGELOG.md)
- [Commits](winstonjs/winston@v3.12.0...v3.13.0)

---
updated-dependencies:
- dependency-name: winston
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

server/package.json

@@ -15,7 +15,7 @@
 		"sequelize": "^6.37.2",
 		"sequelize-cli": "^6.5.2",
 		"supertest": "^6.3.4",
-		"winston": "^3.12.0",
+		"winston": "^3.13.0",
 		"winston-daily-rotate-file": "^5.0.0"
 	},
 	"name": "myclassroom",