Version 0.9.0

[fredmorcos]

Changes in 0.9.0:

• Dependency version updates.
• Remove the enum-utils and failure crates as dependencies. The failure crate was a dependency of enum-utils and has a security vulnerability which will not be fixed and the crate is deprecated anyway. The enum-utils crate wasn't used much so it was replaced with custom code.
• Update to clap version 4 for the parsing command-line arguments.
• Switch from OpenSSL to rusTLS. The former was causing linking problems on modern Ubuntu systems.
• Minor code and documentation cleanups and modernization.