Replace Outdated Dependencies with Built-in Go Functionality

[hj-johannes-lee]

Hi,

I’ve noticed that the first two dependencies of the cli package haven’t been updated and no longer maintained. For example, go-spew hasn't had updates for about 7 years. Considering that Go now has the v+ argument for printing structs, I’m wondering if this dependency is still necessary.

1. Are these outdated dependencies still required for cli?
2. Could these dependencies be replaced with built-in Go functionality, considering Go’s "evolution"?

Thanks.