Bump @types/node from 14.0.13 to 14.6.4 in /server

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 14.0.13 to 14.6.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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

server/package-lock.json

@@ -747,9 +747,9 @@
       }
     },
     "@types/node": {
-      "version": "14.0.13",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.13.tgz",
-      "integrity": "sha512-rouEWBImiRaSJsVA+ITTFM6ZxibuAlTuNOCyxVbwreu6k6+ujs7DfnU9o+PShFhET78pMBl3eH+AGSI5eOTkPA==",
+      "version": "14.6.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.6.4.tgz",
+      "integrity": "sha512-Wk7nG1JSaMfMpoMJDKUsWYugliB2Vy55pdjLpmLixeyMi7HizW2I/9QoxsPCkXl3dO+ZOVqPumKaDUv5zJu2uQ==",
       "dev": true
     },
     "@types/qs": {

server/package.json

@@ -29,7 +29,7 @@
     "@types/express": "^4.17.6",
     "@types/jest": "^26.0.0",
     "@types/morgan": "^1.9.1",
-    "@types/node": "^14.0.13",
+    "@types/node": "^14.6.4",
     "@types/request": "^2.48.5",
     "@types/supertest": "^2.0.9",
     "jest": "24.9.0",