* Updated with-custom-reverse-proxy
* Updated readme of with-env-from-next-config-js
* Updated the kea example
* Updated with-mobx
* Updated with-mobx readme
* Updated the with-mobx-react-lite example
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.
