Typings files not initially found

[nicknisi]

🐛 bug report

Description of the problem

Typings are not initially found by the editor. This seems to be affecting both Monaco and VSCode editors. After a file is edited, the red underlines go away for the node_modules typings in Monaco, and everything in VSCode. This seems to be occurring on both the Dojo and React+TS templates.

How has this issue affected you? What are you trying to accomplish?

The editor seems to not know about modules loaded, causing confusion.

Link to sandbox: Dojo and React+TS

Your Environment

Software	Name/Version
Сodesandbox	PROD-1539886201-8ea3d55
Browser	Firefox 62, Chrome 72
Operating System	macOS Mojave

[CompuIves]

Interesting. It seems to me we should delay the type checking until we made sure that all the types have been downloaded. Definitely something in VSCode, I can fix it tomorrow!

[CompuIves]

Whooh I have improved this a lot! You can now also view/edit typing files in the editor, we also download peer dependencies of types and we don't show errors initially. Exciting! Will deploy it today.

Also fixes #819 #1127 #1164.

[nicknisi]

Amazing! Thanks so much!

[CompuIves]

It's live!