v0.2.1

What's Changed

• Updated versions of altrios-core and altrios-proc-macros in Cargo.toml files by @sakhtar312 in #51
• Feature/version demo by @calbaker in #52
• improved speed_set and speed_sets validation by @calbaker in #53
• added new and __new__ methods for Elev by @calbaker in #54
• exposed Heading and Elev in python by @calbaker in #55
• exposed SpeedSet via pyo3 by @calbaker in #57
• Updated altrios-core version to 0.2.1 in Cargo.toml by @sakhtar312 in #59
• Updated version to 0.2.1 in pyproject.toml by @sakhtar312 in #58

Full Changelog: v0.2.0...v0.2.1