v6.8.0

• Added: make:command to metro cli so you can create custom commands in Nylo 🚀
• Added: addPackages method to MetroService
• Added: dev parameter to addPackages and addPackage methods
• Added: withQueryParams to RouteView class
• Added: hasQueryParameter(String key) to NyState class. This will allow you to check if a query parameter exists in the current route.
• Update: runProcess to connect all streams to the process
• Added: New stub for creating commands
• New ny_cli.dart file to handle custom commands
• Merge PR contribution from voytech-net #37
• Update pubspec.yaml