Update dep @artsy/palette from 5.1.14 to v5.1.15

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@artsy/palette	dependencies	patch	5.1.14 -> 5.1.15

See full list of changes here.

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Release Notes

artsy/palette

### [`v5.1.15`](https://togithub.com/artsy/palette/blob/master/CHANGELOG.md#v5115-Mon-Jan-20-2020) [Compare Source](https://togithub.com/artsy/palette/compare/v5.1.14...v5.1.15) ##### 🐛 Bug Fix - `@artsy/palette` - add XCircleIcon [#​627](https://togithub.com/artsy/palette/pull/627) ([@​ds300](https://togithub.com/ds300)) ##### 🏠 Internal - `@artsy/palette` - Update dep typescript from 3.7.2 to v3.7.5 [#​617](https://togithub.com/artsy/palette/pull/617) ([@​renovate-bot](https://togithub.com/renovate-bot)) ##### Authors: 2 - David Sheldrick ([@​ds300](https://togithub.com/ds300)) - WhiteSource Renovate ([@​renovate-bot](https://togithub.com/renovate-bot)) * * *

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[artsyit]

:rocket: PR was released in v1.21.12 :rocket: