Feature request: show last release date per package on `:PlugStatus`

Many package websites (Npm, Crates.io) give how long it's been since the last update for a package. With a lot of plugins, it can be helpful when cleaning up to see which ones might be going out of date. `:PlugStatus` shows only "OK" if there are no problems, so perhaps some additional info would be helpful.

Since `:PlugUpdate` is also available, showing this info inside `:PlugStatus` using local git information would be acceptable. The format could be something like `vim-repeat: OK (updated 2 months ago)`, or `vim-repeat: OK (2 months ago)`, or `vim-repeat: OK (2019-04-01)`.

Ideas and thoughts?