Version

[Schelin78]

Hi saw this in the logs

Logger: homeassistant.loader
Source: loader.py:786
First occurred: 9:29:23 (1 occurrences)
Last logged: 9:29:23

No 'version' key in the manifest file for custom integration 'growatt'. As of Home Assistant 2021.6, this integration will no longer be loaded. Please report this to the maintainer of 'growatt'

[Diondk]

I created pull request #3 to fix the issue.