v0.9.9

What's Changed

🚀 Features

• refactor: simplify matrix operations in pvpr0 function by @pennbay in #63
• feat: add sperturb propagators by @pennbay in #64
• feat: implement solve_kepler functions by @pennbay in #65
• feat (twobody): add Lagrange and Kepler propagators by @pennbay in #66
• fix: improve initial guess for solve_kepler_elps by @pennbay in #68
• fix: update rotation matrix functions to use ArrayLike for angle para… by @pennbay in #69
• feat: add orbital elements calculations by @pennbay in #70
• refactor: kepler_prop to support vectorized time steps by @pennbay in #72

Full Changelog: v0.9.8...v0.9.9