Upgrade TS to 4.4

Summary: per title. TS 4.4 is awesome btw, with the much improved control flow analysis.

Reviewed By: timur-valiev

Differential Revision: D30806769

fbshipit-source-id: a41aa7bf10fdb0047ddb6210082b5e1fbdfb255f

desktop/doctor/package.json

@@ -20,7 +20,7 @@
     "prettier": "^2.3.2",
     "ts-jest": "^26.5.6",
     "tslint-config-prettier": "^1.18.0",
-    "typescript": "^4.3.5"
+    "typescript": "^4.4.2"
   },
   "scripts": {
     "reset": "rimraf lib *.tsbuildinfo",