Add `isimulator push` command

[Adam Svoboda]

🌈 Desired state

isimulator push <package-name> <title> <message>
isimulator push <package-name> <json>

📂 Sources

xcrun simctl push booted com.thefuntasty.grason test.json

{
  "aps" : {
    "alert" : {
      "title" : "Hello World",
      "body" : "Test Body"
    },
    "mutable-content" : false
  }
}

https://medium.com/better-programming/how-to-test-push-notifications-on-the-ios-simulator-9b5062519622