0.4.3

Commits

• f434f31: updated cargo.lock (Philipp Hentschel)
• 0cdb868: Updated Lib and Bin Projects to Rust 2021 (Philipp Hentschel)
• d716fd8: Fixed tests (Philipp Hentschel)
• 7a14629: Bumped version number to 0.4.3 (Philipp Hentschel)