Revert "Test on lowest and highest dependencies"

This reverts commit 8ebb4bb.

Author: ihor-sviziev

composer.json

@@ -9,7 +9,7 @@
     "version": "6",
     "require": {
         "php": ">=7.2",
-        "squizlabs/php_codesniffer": "^3.5.4",
+        "squizlabs/php_codesniffer": "^3.5",
         "webonyx/graphql-php": "^14.9"
     },
     "require-dev": {