Implement a Select control

[cr101]

It would be great to have a Select field type in Gutenberg out of the box. The component could be used to link two different CPTs (Books and Authors) or select multiple custom taxonomy terms. This React Select control (https://github.com/JedWatson/react-select) is a great one.

[hadamlenz]

I just implemented react-select in this component in my first custom block. Much of it is from the githubusers example on JedWatson's project

Check out the edit statement here to see how it works in registerBlockType()