Bump @fortawesome/free-solid-svg-icons from 5.14.0 to 5.15.3

Bumps [@fortawesome/free-solid-svg-icons](https://github.com/FortAwesome/Font-Awesome) from 5.14.0 to 5.15.3.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@5.14.0...5.15.3)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -7,7 +7,7 @@
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "^1.2.30",
     "@fortawesome/free-brands-svg-icons": "^5.15.3",
-    "@fortawesome/free-solid-svg-icons": "^5.14.0",
+    "@fortawesome/free-solid-svg-icons": "^5.15.3",
     "@fortawesome/react-fontawesome": "^0.1.11",
     "@material-ui/core": "^5.0.0-alpha.9",
     "d3": "^5.16.0",