update deps

Author: stremovsky

composer.json

@@ -10,12 +10,12 @@
         }
     ],
     "require": {
-        "php": ">=5.6",
+        "php": ">=7.3",
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7",
-        "squizlabs/php_codesniffer": "^2.9"
+        "phpunit/phpunit": "^9.5",
+        "squizlabs/php_codesniffer": "^3.7"
     },
     "autoload": {
         "psr-4": {