Bump font-awesome-sass from 5.15.1 to 6.1.1

Bumps font-awesome-sass from 5.15.1 to 6.1.1.

Release notes

Sourced from font-awesome-sass's releases.

Font Awesome Free 6.1.1

No release notes provided.

Font Awesome Free 6.1.0

https://fontawesome.com/docs/changelog/

Font Awesome Free 6.0.0

No release notes provided.

Commits

• da54d68 Merge pull request #208 from FortAwesome/v6.1.1-wip
• 30e220b Font Awesome Free 6.1.1
• 2d9ee05 Merge pull request #206 from FortAwesome/v6.1.0-wip
• 7d52b56 Upgrade to Font Awesome Free 6.1.0
• a52582a Merge pull request #205 from FortAwesome/v6.0.0-wip
• c952d93 More README updates
• a869ecb Update README
• f74c2db Remove path.scss file
• 3744a18 Updates to docs and function
• 90937e2 Upgrading to Font Awesome Free 6.0
• Additional commits viewable in compare view