Update @fortawesome/fontawesome-free to the latest version 🚀

[greenkeeper]

Version 5.3.0 of @fortawesome/fontawesome-free was just published.

Dependency	@fortawesome/fontawesome-free
Current Version	5.2.0
Type	devDependency

The version 5.3.0 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of @fortawesome/fontawesome-free.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Release Notes

Release 5.3.0

Added

• New Religion, and Marketing category
• New icons in the Mathematics, and Business category
• New stats for signal, volume, and wifi icons
• New brand icon for the-red-yeti and alipay

Changed

• Adding ethereum to Currency category
• Adding bitcoin and btc to Payments & Shopping

Fixed

• Incorrect name for layer-minus and layer-plus in sponsors.yml
• Reversing route-highway and route-interstate
• Correct version identifier in OTF and web font files
• CSS keyframe names are not minified (and renamed) to prevent conflict with user or app specific names
• Sass placeholder selector added for %fa-icon to fix CSS precendence issue with font-weight

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