I/O should be moved outside the event loop

HomeAssistant 0.109 added detection of blocking I/O in the event loop and has identified this plugin as non-compliant.

Expected Behavior

HomeAssistant should not emit any warnings during the plugin's execution.

Current Behavior

The following warning is emitted to the log approximately every 30 seconds.

WARNING (MainThread) [homeassistant.util.async_] Detected I/O inside the event loop. This is causing stability issues. Please report issue to the custom component author for hildebrandglow doing I/O at custom_components/hildebrandglow/glow.py, line 53: response = requests.get(url, headers=headers)

Possible Solution

Wrapping the calls to the Glowmarkt bindings in hass.async_add_executor_job might help by moving the blocking call off the event thread.

Steps to Reproduce

1. Set up the plugin
2. Verify energy readings are being picked up
3. Check the HomeAssistant server log