Description of the problem, including code/CLI snippet

Feature/Improve suggestion: I use thegitlab cli extensively in my flow and would strongly benefit a cache feature. It would work like this:

gitlab --cache 600 project-member list --project-id 12345

Seehttps://github.com/github/hub/blob/d0e9e009ffc537c656a6cb8ec5cc132be5e4b8df/github/http.go#L400 for inspiration (the--cache feature on thehub tool, equivalent for GitHub).

Expected Behavior

Running this command twice in less than 10 minutes (600 seconds) would only query GitLab API the first time and return the same result.

Actual Behavior

The second command is as long as the first one.

Specifications

• python-gitlab version: 1.8.0
• API version you are using (v3/v4): v4
• Gitlab server version (or gitlab.com): gitlab.com