fix(deps): update dependency @fortawesome/fontawesome-free to v5.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
@​fortawesome/fontawesome-free	dependencies	patch	5.8.0 -> 5.8.1	homepage, source

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Release Notes

FortAwesome/Font-Awesome

### [`v5.8.1`](https://togithub.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md#​581httpsgithubcomFortAwesomeFont-Awesomereleasestag581---2019-03-21) [Compare Source](https://togithub.com/FortAwesome/Font-Awesome/compare/5.8.0...5.8.1) ##### Fixed - Correct the baseline alignment of the linkedin-in brand icon * * *

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