* Update amphtml and canonical rels, put amp behind
experimental flag again, and update checking for amp query
* Fix typescript error
* Re-add flag to next.config.js
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.
* Added Google AMP example
* Added styles and a second page
* Using regular anchor since there is no client-side routing
* Added comment on react config for amp
