manifest file - multiple firmware versions

[achrn]

In the plugin manifest plugin.json, how do I indicate that a plugin will work with both v3.3 and v3.4 firmware?

https://github.com/Duet3D/DuetSoftwareFramework/blob/master/PLUGINS.md doesn't say much about it. I've currently worked around it by setting:

    "dwcVersion": "3",
    "sbcDsfVersion": "3",

and that seems to work for both 3.3 and 3.4 firmware, but I think it would be better to be more specific, if there's a way to do that.