Bump typescript from 4.1.5 to 4.2.3 in /server

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.1.5 to 4.2.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v4.1.5...v4.2.3)

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

server/package.json

@@ -34,7 +34,7 @@
     "rimraf": "3.0.2",
     "ts-jest": "26.5.2",
     "ts-node": "9.1.1",
-    "typescript": "4.1.5"
+    "typescript": "4.2.3"
   },
   "scripts": {
     "build": "yarn clean && tsc -P tsconfig.json && yarn copy-assets && yarn create-commit-sha",

server/yarn.lock

@@ -5054,10 +5054,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@4.1.5:
-  version "4.1.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.5.tgz#123a3b214aaff3be32926f0d8f1f6e704eb89a72"
-  integrity sha512-6OSu9PTIzmn9TCDiovULTnET6BgXtDYL4Gg4szY+cGsc3JP1dQL8qvE8kShTRx1NIw4Q9IBHlwODjkjWEtMUyA==
+typescript@4.2.3:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.3.tgz#39062d8019912d43726298f09493d598048c1ce3"
+  integrity sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw==
 
 typpy@2.3.11:
   version "2.3.11"