Fix: version of iOS in capabilities

Author: Dimitar Todorov

demo-vue/e2e/config/appium.capabilities.json

@@ -36,7 +36,7 @@
   },
   "sim12iPhoneX": {
     "platformName": "iOS",
-    "platformVersion": "12.1",
+    "platformVersion": "12.0",
     "deviceName": "iPhone X",
     "appium-version": "1.9.1",
     "app": ""