Update prettier requirement from ^2.8.6 to ^2.8.7 (#780)

Updates the requirements on [prettier](https://github.com/prettier/prettier) to permit the latest version.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.8.6...2.8.7)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -19,7 +19,7 @@
 		"eslint-config-prettier": "^8.8.0",
 		"eslint-plugin-import": "^2.27.5",
 		"eslint-plugin-prettier": "^4.2.1",
-		"prettier": "^2.8.6",
+		"prettier": "^2.8.7",
 		"stylelint": "^14.16.1",
 		"stylelint-config-recommended": "^9.0.0",
 		"stylelint-no-browser-hacks": "^1.2.1"