v0.4.0 - Update for pacman 0.4.0 API changes

What's Changed

• Update for pacman API changes by @cgay in #13

Full Changelog: v0.3.0...v0.4.0

v0.3.0 Change active packages + `new library` subcommand

• 0f56d45 Add 'new library' subcommand
• f272942 Change the way active packages are handled
• cac3a5c .gitignore file
• 1029d04 Add user guide docs
• 24e41c4 Fix pacman dep, 0.0.2 -> 0.2

v0.2.0 Minimal version selection

This release implements support for dependencies with semantic versions, and uses the "minimal version selection" dependency resolution described in https://research.swtch.com/vgo-principles. See the README.md for details.

Commits since v0.1.0 with "uninteresting" commits removed.

• 1601e84 Update for pacman with minimal version selection
• 1deb256 Use logging library for output
• df47cdf "dylan status" shows git status for active packages
• a735792 "dylan status" displays a list of active packages
• 0cd0156 'dylan status --directory' only shows the directory
• 8f196eb Fall back to ${HOME}/dylan if ${DYLAN} not set
• e41d7f1 Rename workspace-dir command to status, fix exit codes
• 2196e5a README.md: A few updates and edits

dylan-tool v0.1.0 -- arbitrary checkpoint release

This version still mainly works with packages versioned at head, it now uses the command-line-parser library with subcommands. Next step will be to really get package versioning working.

dylan-tool 0.0.1

Just testing the release process here rather than in the opendylan repo.