change version to 1.2.1

composer.json

@@ -13,6 +13,11 @@
             "name": "mahdi mansouri",
             "email": "mahdi.msr4@gmail.com",
             "role": "Developer"
+        },
+        {
+            "name": "Maik Mueller   ",
+            "email": "mueller.maik1@gmail.com",
+            "role": "Developer"
         }
     ],
     "require": {
@@ -69,7 +74,7 @@
             }
         }
     },
-    "version": "1.1.0",
+    "version": "1.2.1",
     "minimum-stability": "stable",
     "prefer-stable": true
 }