geo3d 0.3.2

• 🎯 Exact heights on the polar axis and in the equatorial plane (#63), as to_geodetic promises. There the height is |z| − b or r − a, rounded once. Before, it came back up to a nanometre off: (0°, 0°, 100 m) round-tripped to 99.99999999969262 m. Every other position gives the same answer as 0.3.1, to the bit (checked on a million).
• ⚡ Footprint::containment is inlined (#65), as geo3d's other hot functions are, so a caller's loop tests points without a call into the crate. That makes it 5% to 6% faster per point in a caller's loop, measured.