Opal v0.3.1

The launch release: cleaner terminal output, a new download bar, and opal upgrade. Resolution, downloads, and linking are unchanged, so the benchmarks measured on v0.3.0 still hold: warm and no-op installs timed the same on both builds.

To install Opal v0.3.1

What's new

• A thin download bar in opal colours. No line fills the terminal's last column, the suspected cause of a duplicate bar seen once in Windows Terminal.
• opal upgrade installs the latest release, or a named one, in place. The download is checked against SHA256SUMS and run once before it replaces anything.
• A one-line summary, plus one more line only when it says something: what a re-run kept, or that the shared store supplied everything. A Next.js install now ends in five lines instead of about seventy-five.
• No stale lines between stages. A terminal install no longer leaves "Resolving dependencies" and "Installing N packages" on screen.
• Packages built for other platforms print as one line instead of one each: 66 on a Next.js app.
• Warnings print after the result, so they are the last thing on screen.
• --frozen-lockfile without an opal.lock says so, and how to create one.
• --cache-dir is described in --help.

Full Changelog: https://github.com/saintparish4/opal/compare/v0.3.0...v0.3.1