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.
* Examples: clarify language around Yarn create & npx
* add missing READMEs and create-next-app usage
* suggest people tag jthegedus in firebase related issues
* add yarn alt instructions
* cerebraljs example readme & fixes
* remove global npm install of create-next-app
* add npx to create-next-app command in examples
* add bash to shell snippets
* add yarn create to next-app command in examples
* fix READMEs named with lowercase
* change READMEs to use UPPERCASE
* Add support for URL objects in Link and Router
* Fix typo in comment
* Fix possible bug if the `href` prop is `null`
* Document the usage of URL objects in Link and Router
* Update readme.md
* Parse URL to get the host & hostname in `isLocal`
This should check if the current location and the checked URL have the same `host` or `hostname`.
* Format `as` parameter from object to string if required
* Format `href` and `as` inside the construct and componentWillReceiveProps
* Use `JSON.stringify` to compare objects
* Add usage example
* chore(package): update chromedriver to version 2.28.0 (#1386)
https://greenkeeper.io/
* Refactor the codebase a bit.
* Change the example name.
* Add a few test cases.
* Add the example to the README.
