Use TypeScript and other improvements on feature/apollo-pure

[piglovesyou]

• TypeScript support and non-typed module declaration
• Make codegen always able to run
• Use default client state management in apollo-client and remove apollo-link-state
• refac: make all components functional

[piglovesyou]

@langpavel I turned it to TypeScript. Glad if you take a look.

[langpavel]

I'm out of time this week, please, remind me if I forget :-) Thanks!
BTW If you wish help with universal-router, here is my PR: kriasoft/universal-router#166

[piglovesyou]

TS universal-router

Cool. I'll use your types after it's merged and released.

[piglovesyou]

@langpavel Ready. Glad if you take time.

[piglovesyou]

Thank you Pavel!