[Snyk] Upgrade @fortawesome/fontawesome-free from 5.9.0 to 5.15.3

[snyk-bot]

Snyk has created this PR to upgrade @fortawesome/fontawesome-free from 5.9.0 to 5.15.3.

:information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 31 versions ahead of your current version.
• The recommended version was released 4 months ago, on 2021-03-16.

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[codeclimate[bot]]

Code Climate has analyzed commit e53f987c and detected 0 issues on this pull request.

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