Windows support

[tsuberim]

commands in package.json require rm -rf, mkdir, cat, jq, replace them with the cross platform npm equivalent.

[dkent600]

#32 partially addresses the problems, but the docker commands still don't work.

[ben-kaufman]

This should be working now but I'm unable to test it as I don't have Windows, closing for now and please reopen if this is still relevant.

[dkent600]

Docker command still doesn't work. This is in powershell where are least one has cat:

$ npm run docker:build

> @daostack/migration@0.0.1-rc.23-v2 docker:build C:\Users\dkent\Documents\Projects\GitHub\DAOStack\migration
> docker build . -t daostack/migration:$(cat package.json | jq -r '.version')

'jq' is not recognized as an internal or external command,
operable program or batch file.