Bump @types/jest from 25.2.3 to 26.0.0 in /server

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 25.2.3 to 26.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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

server/package-lock.json

@@ -722,9 +722,9 @@
       }
     },
     "@types/jest": {
-      "version": "25.2.3",
-      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-25.2.3.tgz",
-      "integrity": "sha512-JXc1nK/tXHiDhV55dvfzqtmP4S3sy3T3ouV2tkViZgxY/zeUkcpQcQPGRlgF4KmWzWW5oiWYSZwtCB+2RsE4Fw==",
+      "version": "26.0.0",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-26.0.0.tgz",
+      "integrity": "sha512-/yeMsH9HQ1RLORlXAwoLXe8S98xxvhNtUz3yrgrwbaxYjT+6SFPZZRksmRKRA6L5vsUtSHeN71viDOTTyYAD+g==",
       "dev": true,
       "requires": {
         "jest-diff": "^25.2.1",

server/package.json

@@ -27,7 +27,7 @@
     "@types/compression": "^1.7.0",
     "@types/debug": "^4.1.5",
     "@types/express": "^4.17.6",
-    "@types/jest": "^25.2.3",
+    "@types/jest": "^26.0.0",
     "@types/morgan": "^1.9.0",
     "@types/node": "^14.0.11",
     "@types/request": "^2.48.5",