bower component raven-js results in downstream problem with yarn

[md8n]

If raven-js was installed with bower then the resulting entry in packages.json dependencies ends up as:

"@bower_components/raven-js": "getsentry/raven-js#3.26.1",

Or whichever version of raven-js of course.

However, raven-js has it's own packages.json that does NOT specify a version member. As a result yarn borks on it and dies.

In this case - packages.json of a package does not have a version member - it may require that the package is included in another way e.g. a direct call to yarn add