v0.5.0

New minor release with a bunch of fitting improvements and tests/pre-commit updates.

What's Changed

• try pytest-rerunfailures for flaky NNDC tests by @jvavrek in #304
• Fix ErfModel by @cosama in #306
• Refactor and add more materials by @markbandstra in #301
• Fitter method to compute component-wise areas and their uncertainties by @jvavrek in #303
• Update pre commit and black by @jccurtis in #315
• Downgrade fitting error by @jvavrek in #311
• allow **kwargs in Spectrum.fit by @jvavrek in #308
• Allow lmfit models by @jvavrek in #310
• Release v0.5.0 by @jccurtis in #318

Full Changelog: v0.4.6...v0.5.0