Missing version key in the manifest file

[mshuflin]

Version of the custom_component
235f31b

Describe the bug
Home Assistant now requires a 'version' key in the manifest file.

log

2021-03-31 08:32:23 WARNING (MainThread) [homeassistant.loader] No 'version' key in the manifest file for custom integration 'google_fit'. This will not be allowed in a future version of Home Assistant. Please report this to the maintainer of 'google_fit'