Update dependency @jupyter-widgets/controls to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@jupyter-widgets/controls	dependencies	major	^1.5.2 -> ^2.0.0

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Release Notes

jupyter-widgets/ipywidgets

### [`v2.0.0`](https://togithub.com/jupyter-widgets/ipywidgets/compare/@jupyter-widgets/controls@1.5.3...@jupyter-widgets/controls@2.0.0) [Compare Source](https://togithub.com/jupyter-widgets/ipywidgets/compare/@jupyter-widgets/controls@1.5.3...@jupyter-widgets/controls@2.0.0)

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[captainsafia]

Need to validate this. The diff doesn't look too large though.

@jasongrout Any insights on why the major version bump?

[rgbkrk]

I'm going to close this since there are current conflicts and let @renovate-bot have at it again later.