• Fixes an issue when running zef with -Ilib (instead of -I.) which would result in an error about an empty :ver<> by explicitly asking for one of a few different possible valid versions.
• Removes the prove plugin. The existing test plugin that runs with raku directly is the new default, and the raku TAP module can be downloaded (and will automatically be used by zef) if users want a test harness. The --prove and --/prove flags will be ignored now, and using them will print out a deprecation message.
• Zef::Repository::* plugins no longer print directly to stdout/stderr, and instead use a logger.
• Fixes a regression with v0.20.* where having RAKULIB set would cause zef install ... to fail during testing. This is fixed by changing the zef test plugin to pass in library paths via -I /some/path instead of setting RAKULIB=/some/path.
• Fixes a regression from v0.20.1 where the displayed name of an already installed distribution being installed from a path would show up as the .raku output of a data structure instead of the path.