v0.3.0

What's Changed

• Allocate ports for first-party run= apps (port=auto) by @jssblck in #33
• Replace stringly-typed container_id with a typed Backend enum (#17) by @jssblck in #34
• Make service ordering deterministic with an IndexMap (#21) by @jssblck in #35
• Collapse the three health-check wait loops into one helper (#18, #19) by @jssblck in #36
• Fail closed on a malformed command= override (#15) by @jssblck in #37
• Extract and unit-test volume-spec resolution (#20) by @jssblck in #38
• Scope Windows support claim to the Docker-backed sources (#16) by @jssblck in #39
• Remove em-dashes from doc comments and a docs file (#22) by @jssblck in #40

Full Changelog: v0.2.1...v0.3.0