v2.0.3 - New switch entity features and other fixes

• Fixed issue where if a device that was set to connect via direct IP was offline, then the next device to be casted would either not work, or take over 10 minutes.
• New feature to add a switch entity per device (as well as globally). This new switch per device will ignore any global switch entities.
• New feature to use a custom entity state for when casting is enabled.
• Removed deprecated async call async_track_state_change and updated to async_track_state_change_event