Merge pull request #3 from sveneld/dependency-improvement

add compatibility with slevomat/coding-standard version 7

Author: suin

composer.json

@@ -29,7 +29,7 @@
     "require": {
         "php": ">=7.1",
         "ext-json": "*",
-        "slevomat/coding-standard": ">=4.7 <5.0.0",
+        "slevomat/coding-standard": ">=4.7 <8.0.0",
         "squizlabs/php_codesniffer": ">=3.3 <4.0.0"
     },
     "autoload": {