[BUG] `npm fund <package>` errors when "funding" is a string

[panva]

What / Why

While #472 has fixed the npm fund command not showing packages where "funding" is a string, the npm fund <package-name> command doesn't work for these.

In the screenshot below glob got opened, the other one didn't.

Expected Behavior

npm fund <package> works regardless of the funding property being a shorthand string or an object.

[ljharb]

cc @ruyadorno