* Typecheck server vs. client code independently, ensuring that each respects its own tsconfig.
* Use nextjs default distDir in tsconfig
* Update packages
* Fix type error in server.listen callback
* Update all dependencies and remove redundant ones from package.json. (60f9ee5)
* Fixes#5596 by adjusting nodemon scripts (d4b7d3a)
* Fixes `npm start` on windows by using `cross-env` (9555217)
* Move compiled server out from `.next`. Compiling other JS into `.next` seems incorrect. (79fce02,
9ce7086)
* Partly fixes#5753 by making sure typescript compiles with `es2017` as target, at least ensuring code is runnable on node 8. Previously it was compiled with `esnext`. (9176e92)
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I tried improving the structure by keeping source in `src/app` and `src/server` and then building to `dist/server` and `dist/app` but I didn't really get it to work and made most configs more complicated. Moved the built server out from `.next` anyway.
