stpipe 0.4.3

What's Changed

• add RTD configuration by @zacharyburnett in #70
• Support step config files in interactive mode by @mcara in #74
• JP-3018: Restore support for step list arguments at command line by @mcara in #73
• move build configuration into pyproject.toml by @zacharyburnett in #56

Full Changelog: 0.4.2...0.4.3