2.0.0

Code refactor:

• pre-commit
• pylint
• cleaned up sensor collection functions

Enhancements:

• Publishes to three topics. /air-quality, /environment, /system to avoid PM25 issues preventing publishing of other sensors.
• SGP30 baseline storage and retrieval moved to MQTT.
• Permissive license added to all files.

1.0.0

Initial version