Bump extend from 2.0.0 to 2.0.2 in /server

Bumps [extend](https://github.com/justmoon/node-extend) from 2.0.0 to 2.0.2.
- [Release notes](https://github.com/justmoon/node-extend/releases)
- [Changelog](https://github.com/justmoon/node-extend/blob/main/CHANGELOG.md)
- [Commits](justmoon/node-extend@v2.0.0...v2.0.2)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

server/package-lock.json

@@ -29,7 +29,7 @@
     "express": "4.13.3",
     "express-session": "1.12.1",
     "express-validation": "0.5.0",
-    "extend": "2.0.0",
+    "extend": "2.0.2",
     "farmhash": "1.1.0",
     "fast-csv": "2.0.0",
     "filehound": "1.13.0",