v0.3.0

What's Changed

• Layered spheres: kernel, closed-form derivatives and ensembles (0.3.0) by @dannyzed in #6
• perf(mie): faster sphere kernel — shorter recurrences, one-division reciprocal, fused Jacobian sums by @dannyzed in #8
• Randomly oriented spheroids: the T-matrix method (part of 0.3.0) by @dannyzed in #7

Full Changelog: v0.2.0...v0.3.0