v1.2.1

New feature (before winter hits)

• better graph using highchart
• add option to store temperature and relay state on every tick in influxdb
• leverage influxdb aggregation to get daily/weekly/monthly graph (mean)
• better config validation (using pydantic)
• make sure the code can run "not-on-a-pi" to speed up dev (in that case temperature readings are random-ish)