chore(deps): update dependency squizlabs/php_codesniffer to v3.5.6

Author: renovate-bot

composer.json

@@ -12,7 +12,7 @@
     "dealerdirect/phpcodesniffer-composer-installer": "0.7.0",
     "phpcompatibility/phpcompatibility-wp": "2.1.0",
     "phpunit/phpunit": "9.1.4",
-    "squizlabs/php_codesniffer": "3.5.5",
+    "squizlabs/php_codesniffer": "3.5.6",
     "wp-coding-standards/wpcs": "2.3.0",
     "slevomat/coding-standard": "6.3.9",
     "edgedesign/phpqa": "1.23.3",