rig 0.3.1 pre-release

This is a pre-release, so we can start testing the macOS menu bar app, and also start using the new name.

Use the installers on macOS and Windows.

To install on Linux run:

curl -Ls https://github.com/r-lib/rig/releases/download/v0.3.1pre/rig-linux-0.3.1.tar.gz |
  sudo tar xz -C /usr/local

On arm64 Linux run:

curl -Ls https://github.com/r-lib/rig/releases/download/v0.3.1pre/rig-linux-arm64-0.3.1.tar.gz |
  sudo tar xz -C /usr/local

macOS menu bar app

The macOS .pkg files also include a menu bar app, which you can start as

open -a Rig

Once it is running, you can set Preferences... -> Launch at login to auto-start it in the future.

Multiple user package libraries

rig now supports creating multiple user package libraries, and switching between them. See rig library --help for details.