fix(deps): update dependency react-transition-group to ^2.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
react-transition-group	dependencies	minor	^2.4.0 -> ^2.5.1	source

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Release Notes

reactjs/react-transition-group

### [`v2.5.1`](https://renovatebot.com/gh/reactjs/react-transition-group/blob/master/CHANGELOG.md#​251httpsgithubcomreactjsreact-transition-groupcomparev250v251-2018-12-10) [Compare Source](https://renovatebot.com/gh/reactjs/react-transition-group/compare/v2.5.0...v2.5.1) ##### Bug Fixes - prevent calling setState in TransitionGroup if it has been unmounted ([#​435](https://renovatebot.com/gh/reactjs/react-transition-group/issues/435)) ([6d46b69](https://renovatebot.com/gh/reactjs/react-transition-group/commit/6d46b69)) ### [`v2.5.0`](https://renovatebot.com/gh/reactjs/react-transition-group/blob/master/CHANGELOG.md#​250httpsgithubcomreactjsreact-transition-groupcomparev240v250-2018-09-26) [Compare Source](https://renovatebot.com/gh/reactjs/react-transition-group/compare/v2.4.0...v2.5.0) ##### Features - update build and package dependencies ([#​413](https://renovatebot.com/gh/reactjs/react-transition-group/issues/413)) ([af3d45a](https://renovatebot.com/gh/reactjs/react-transition-group/commit/af3d45a))

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