chore: bumped to 0.7.3

[eschmidt42]

This pull request updates the version numbers for the project in both the Rust and Python package configuration files to prepare for a new release.

Version bump for release:

• Updated the version in Cargo.toml from 0.7.2 to 0.7.3 to reflect a new Rust package release.
• Updated the version in pyproject.toml from 0.7.2 to 0.7.3 for the Python package.