Remove unused dependencies

[alexparish]

The package agent-base is listed in this package's dependencies but is not used in the codebase. Can it be removed?

Additionally the package temp-fs is listed in dependencies but is only referenced in tests. Can it be moved to devDependencies?

This could be classed as general housekeeping but a benefit for the consumer is a reduction in bandwidth required when installing or updating this package.

I'd be happy to submit a PR for these changes.

[mgol]

temp-fs was last published 9 years ago! I'd replace it with native Node.js fs.mkdtemp(). That gives you a fresh temporary directory in which you can create as many temporary files as you need.