Update squizlabs/php_codesniffer requirement from ^3.8.0 to ^3.10.3

Updates the requirements on [squizlabs/php_codesniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer) to permit the latest version.
- [Release notes](https://github.com/PHPCSStandards/PHP_CodeSniffer/releases)
- [Changelog](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/CHANGELOG.md)
- [Commits](PHPCSStandards/PHP_CodeSniffer@3.8.0...3.10.3)

---
updated-dependencies:
- dependency-name: squizlabs/php_codesniffer
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -37,7 +37,7 @@
     "wpackagist-theme/twentytwentyfour": "^1.0"
   },
   "require-dev": {
-    "squizlabs/php_codesniffer": "^3.8.0",
+    "squizlabs/php_codesniffer": "^3.10.3",
     "roave/security-advisories": "dev-latest",
     "eighteen73/satellite": "^1.1",
     "eighteen73/wordpress-coding-standards": "^2.0"