What's Changed
* Secrets cleanup by justmobilize in https://github.com/adafruit/Adafruit_CircuitPython_PortalBase/pull/105
Minor updates to remove secrets usage and update keys:
- Remove secrets_data
- Update secrets.py comments to settings.toml
- Update AIO keys from AIO_* to ADAFRUIT_AIO_*
- Update learn links to point to correct page for settings.toml
- Update adafruit_portalbase.network.NetworkBase._get_setting to handle newer ADAFRUIT_AIO_* key names and show a warning when using secrets (tests added to make sure it's working as expected)
**Full Changelog**: https://github.com/adafruit/Adafruit_CircuitPython_PortalBase/compare/2.1.3...3.0.0