bug: Plugins signed with ethpkg 0.9.0 does not work

[gonzalobellino]

Grid v1.6.2 fail loading plugins signed with ethpkg 0.9.0.
The console show a error similar that "signature invalid or corrupt file"

I resolved this problem signing my plugin with ethpkg 0.3.0, but is really difficult put to work this old version
In other hand a reference in docs about this compatibility issue will be really useful

[PhilippLgh]

Hi @gonzalobellino thanks for the report. We are planning to do a new Grid release soon and I might be able to assist your use case to make sure you can either use the new version or fork and use an older version. Will give an update here once the scope of the release is clear which should happen in the next 1-2 weeks.

[gonzalobellino]

I can publish a docker image with ethpkg 0.3.0 if you think that will be useful