* Add `hidden` legendPosition to `Chart`.
Sometimes, for example, when there is a single data set, there is no need for rendering the legend. It may even introduce more confusion than value. It seems interactive, but there is nothing you can do with it.
Fixes: https://github.com/woocommerce/google-listings-and-ads/issues/618
* Add `@storybook/addon-knobs` to devDependencies.
It was used but not explicitely stated.
* Add a changelog entry.
* Add tests for legendPosition in Chart component
Co-authored-by: Lourens Schep <lourensschep@gmail.com>
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