Update dependency @fortawesome/fontawesome-free to v6.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@fortawesome/fontawesome-free (source)	6.5.2 -> 6.6.0

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Release Notes

FortAwesome/Font-Awesome (@​fortawesome/fontawesome-free)

### [`v6.6.0`](https://togithub.com/FortAwesome/Font-Awesome/compare/6.5.2...b355d634c59eb3b3d222a2447504dcf9b211e442) [Compare Source](https://togithub.com/FortAwesome/Font-Awesome/compare/6.5.2...6.6.0)

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