yarnpgk version of the wsrun 2.1.0 tarball is bad.

[krotscheck]

Upgrading to 2.1.0 broke my build. A bit of investigation showed that workspaceGlobs in index.js reads 'workspace' not 'workspaces', and doesn't include any of the changes in #18.

const workspaceGlobs = JSON.parse(fs.readFileSync('./package.json', 'utf8')).workspace || [
    'packages/*'
];

A bit more digging showed that the wsrun tarball in the yarn registry includes this change:
wget https://registry.yarnpkg.com/wsrun/-/wsrun-2.1.0.tgz

[spion]

2.1.1 should have the build of the latest sources

[krotscheck]

Confirmed, works again!