v0.3.0

In this release

• 🎉 The public debut of SWprepost.
• 📚 More detailed documentation including Jupyter notebook galleries.
• ✨ Jupyter workflow for surface wave inversion, following Vantassel and Cox (2020).
• 🔨 Major class refactoring to reduce code reuse.
• ✅ Improved test coverage.
• 🐛 Several minor bug fixes.