v0.2.1

Fixed

• fixed protocol address and port range check during deserialization

Other

• enhance PortStates with panic checks, indexing, and iterator implementations; improve Address decoding and formatting
• improve set_timeout method in tokio synchronous Modbus client
• update README.md to clarify image description
• (deps) update flexi_logger requirement from 0.30 to 0.31
• (deps) bump crate-ci/typos from 1.32.0 to 1.33.1
• (deps) bump crate-ci/typos from 1.31.1 to 1.32.0
• add port display implementation
• removed command line example
• fix typo