hwinne

'theme' prop in ReplacementVariableEditorStandalone.js is undefined

1

## Explanation When trying to click `Edit snippet` in the Snippet Editor on the local Yoast Components page, an error gets thrown because the `theme` prop can not be found....

## Explanation The peer dependency react-dom should be version `^16.2.0`, instead of `16.2.0`. Because `react` and `react-dom` will be updated to version `16.8.6` (see [#12766](https://github.com/Yoast/wordpress-seo/pull/12766)), because than it matches `@wordpress/element`....