we just wanted to let you know that we started to work on a refresh of the backend infrastructure. Kotori has finally(!) been ported to Python 3 with version 0.26.0  and we are just working on overhauling the packaging process.
On the foundation infrastructure side, we are still running Grafana 6.7 and would like to upgrade to Grafana 7.4 . When looking at Mosquitto, version 2.0 has been released in December 2020  which improves support for the MQTT v5 protocol, see also MQTT5 is coming and Mosquitto 1.6 with MQTT v5 arrived.
Last but not least, InfluxDB version 2 is also available since November 2020 , see InfluxDB 2.0 is coming. However, we will go with InfluxDB 1.8 first, we are still running version 1.7.10.
With kind regards,
 grafana/CHANGELOG.md at master · grafana/grafana · GitHub
 mosquitto/ChangeLog.txt at master · eclipse/mosquitto · GitHub
 influxdb/CHANGELOG.md at master · influxdata/influxdb · GitHub