Make the use of commands optional

[untemps]

Fuse.js increases your bundle size by > 50% judging on its unpacked size and your current package's unpacked size. That's quite big. I think it (and therefore commands) should be optional. You can set it as a peer dependency with a peerDependenciesMeta section to achieve that, should you want to.

Originally posted by @Sidnioulz in https://github.com/untemps/react-vocal/pull/58#discussion_r670185828