@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/plugins/fresco/index.tsx

@@ -141,7 +141,7 @@ export default class FlipperImagesPlugin extends FlipperPlugin<
         }
         pluginData = {
           ...pluginData,
-          events: [{eventId: index, ...event}, ...pluginData.events],
+          events: [{...event, eventId: index}, ...pluginData.events],
         };
       });
       const idSet: Set<string> = levels.reduce((acc, level: CacheInfo) => {