Print the package name or package.json path on failure.

[patrickarlt]

I'm integrating this into a monorepo using NPM workspaces. In general everything works great. However I noticed that if this does encounter an error it doesn't print the name of the package or let me know what file has errors:

For example:

npm exec -w ./packages package-check

Would run @skypack/package-check on all packages under ./packages. One of those has an error but I cant tell which one failed.

By contrast the name of the package is printed at athe bottom for successful runs:

Seems as simple as adding a name param to runCheck. Alternately this could print the path to the checked package.json at the top or add this under a --verbose flag. Happy to PR the change.