Component not loaded anymore

seems some updates are needed :-)
HA 2021.8.8


```
2021-08-21 00:47:41 ERROR (SyncWorker_0) [homeassistant.loader] The custom integration 'systemair' does not have a valid version key (None) in the manifest file and was blocked from loading. See https://developers.home-assistant.io/blog/2021/01/29/custom-integration-changes#versions for more details
```