Fixed deps conflict (#12)

Author: SmetDenis

composer.json

@@ -28,7 +28,7 @@
     },
 
     "require-dev"  : {
-        "jbzoo/toolbox-dev" : "^4.0.1",
+        "jbzoo/toolbox-dev" : "^4.1.1",
         "symfony/process"   : ">=4.4"
     },