Update Font Awesome to v6 (major)

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@fortawesome/fontawesome-svg-core (source)	^1.2.36 -> ^6.0.0
@fortawesome/free-solid-svg-icons (source)	^5.15.4 -> ^6.0.0

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Release Notes

FortAwesome/Font-Awesome

v6.4.0

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Change log available at https://fontawesome.com/docs/changelog/

v6.3.0

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Change log available at https://fontawesome.com/docs/changelog/

v6.2.1

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Change log available at https://fontawesome.com/docs/changelog/

v6.2.0

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Change log available at https://fontawesome.com/docs/changelog/

v6.1.2

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Change log available at https://fontawesome.com/docs/changelog/

v6.1.1

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Change log available at https://fontawesome.com/docs/changelog/

v6.1.0

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Change log available at https://fontawesome.com/docs/changelog/

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