0.13.2

What's Changed

• Fix scaling range for brightness scaling by @loopj in #247
• Remove BackBox objects from device registry, special-case parent relationship by @loopj in #248
• Populate serial_number for Master and StationObject devices by @loopj in #249
• Migrate to pyproject.toml by @loopj in #250

Full Changelog: 0.13.1...0.13.2