Bump version to 2.0.1 and update PHPUnit dependency

Author: riverside

composer.json

@@ -2,7 +2,7 @@
     "name": "riverside/php-waf",
     "description": "PHP Web Application Firewall",
     "type": "library",
-    "version": "2.0.0",
+    "version": "2.0.1",
     "keywords": ["php", "firewall", "waf", "application", "webapp"],
     "homepage": "https://github.com/riverside/php-waf",
     "license": "MIT",
@@ -18,7 +18,7 @@
         "php": ">=7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "8"
+        "phpunit/phpunit": "8.5.52"
     },
     "autoload": {
         "psr-4": {