Add support for globs in package.json#source

[devongovett]

Closes #3821

This implements support for globs in the package.json "source" field, both top-level and inside targets. Multiple globs are also supported when listed in an array.

[mischnic]

Should this introduce a glob invalidation? Similar to

parcel/packages/core/core/src/requests/EntryRequest.js

Lines 69 to 73 in 90ca165

	// If the entry specifier is a glob, add a glob node so
	// we invalidate when a new file matches.
	if (isGlob(filePath)) {
	api.invalidateOnFileCreate({glob: input});
	}

[devongovett]

gonna merge this to unblock some stuff, lmk if you see anything else I should change!

[buvinghausen]

Thanks @devongovett let me know once you get this out to npm so I can remove my janky hacks from our stack!

[devongovett]

feel free to try the latest canary tag now. otherwise it'll be out in the next regular release.