@allow-large-files Upgrade typescript

Summary: This diff updates the typescript version and it fixes `yarn lint:tsc`. It also successfully pointed out fes of the problems in our codebase. I have fixed those problems

Reviewed By: mweststrate

Differential Revision: D21548003

fbshipit-source-id: e69c986ee3c763588d9e1e290dad08d1cf1976a8

desktop/app/src/ui/components/elements-inspector/Visualizer.tsx

@@ -111,7 +111,6 @@ function Visualizer(props: {
             userSelect: 'none',
           }}></div>
       )}
-      />
     </VisualizerContainer>
   );
 }