fix(deps): update dependency react-modal to v3.11.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
react-modal	dependencies	minor	3.10.1 -> 3.11.1

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Release Notes

reactjs/react-modal

### [`v3.11.1`](https://togithub.com/reactjs/react-modal/blob/master/CHANGELOG.md#v3111---Fri-25-Oct-2019-210209-UTC) [Compare Source](https://togithub.com/reactjs/react-modal/compare/v3.10.1...v3.11.1) - [ee1a363](../../commit/ee1a363) chore: update webpack\* versions. - [4ac3ff4](../../commit/4ac3ff4) [added]: pass overlay and content element references to onAfterOpen fn ([#​741](https://togithub.com/reactjs/react-modal/issues/741)) - [9be00a9](../../commit/9be00a9) [fixed] some untabbable elements are being returned from findTabbable ([#​774](https://togithub.com/reactjs/react-modal/issues/774)) - [4dd25ac](../../commit/4dd25ac) chore: changed xvfb to a service. - [2d4f231](../../commit/2d4f231) chore: changed xvfb to a service.

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