#66 fix composer file

Author: JBlond

composer.json

@@ -32,7 +32,7 @@
 		"digilive/git-changelog": "^0.1.1",
         "jblond/php-cli": "^1.0",
         "phpmd/phpmd": "2.*",
-        "phpunit/phpunit": "^9.*",
+        "phpunit/phpunit": "9.*",
         "squizlabs/php_codesniffer": "*"
     },
     "suggest": {