Bump ts-jest from 26.5.2 to 26.5.3 in /server (#445)

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 26.5.2 to 26.5.3.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/master/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v26.5.2...v26.5.3)

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server/package.json

@@ -76,7 +76,7 @@
     "snyk": "^1.486.0",
     "start-server-and-test": "^1.12.0",
     "supertest": "^6.1.3",
-    "ts-jest": "^26.5.2",
+    "ts-jest": "^26.5.3",
     "typescript": "^4.2.2"
   },
   "dependencies": {