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/pkg-lib/package.json

@@ -29,7 +29,7 @@
     "rimraf": "^3.0.2",
     "ts-jest": "^26.5.6",
     "ts-node": "^9.1.1",
-    "typescript": "^4.3.5"
+    "typescript": "^4.4.2"
   },
   "scripts": {
     "reset": "rimraf lib *.tsbuildinfo",