v.5.0.21

Improvements:

1. Service dependencies were updated.

2. Added resource /ws to get events by websockets, see ws.

3. InfluxDB OSS 2.x configuration was supported for monitoring.

Bugs fixed:

1. Fix validation schemas representation for Sphinx documentation (see validation schemas).

How to update from previous version:

To update from previous version, replace all folders with files and update dependencies from requirements.txt.