0.3.0b16

What's Changed

• Allow casting Str to str for debugging purposes, but emit a warning by @bartfeenstra in #1278
• Allow Codecov.io to aggregate coverage reports submitted by all parallel CI builds by @bartfeenstra in #1279
• Allow LinkedDataDumpable to provide its own JSON Schema by @bartfeenstra in #1280
• Improve subprocess logging by @bartfeenstra in #1281
• Remove pytest-xdist because of random failures by @bartfeenstra in #1283
• Improve the translation documentation by @bartfeenstra in #1285
• Correct an overly loose type hint by @bartfeenstra in #1286
• Document npm by @bartfeenstra in #1287
• Simplify the GUI's locale code by @bartfeenstra in #1288
• Clean up and simplify GUI main window handling by @bartfeenstra in #1289
• Add BettyQtBot to augment QtBot and simplify assertion fixture access by @bartfeenstra in #1290
• Remove undocumented *args and **kwargs" from GUI class initializers by @bartfeenstra in #1291

Full Changelog: 0.3.0b15...0.3.0b16