I wrote a [script](https://github.com/j0lv3r4/dependency-version-updater) to update dependencies recursively in `package.json` files, e.g.:
```
$ node index.js --path="./examples" --dependencies="react=^16.7.0,react-dom=^16.7.0"
```
This PR contains the result against the examples folder.
* Simplify route info handling.
* Add basic resolve=false support.
* Make sure to render getInitialProps always if it's the first render.
* Change resolve=false to shallow routing.
* Add test cases for shallow routing.
* Update README for shallow routing docs.
* Update docs.
* Update docs.
* Update docs.
