v0.3.0

Added

• Improved documentation
• [Rust]: The Builder now has impls for Send and and Sync
• [Rust]: We now derive Ord, Eq, Hash and Default in some cases
• [Rust]: Added an MSRV policy
• Added a type-check for name overlap between namespaces and declarations
• Added generate-completions subcommand to planus-cli to generate shell completions for popular shells
• Added a DOT backend
• Added a version check to guard against using out-of-date code

Fixed

• Fixed some typos by @OliverEvans96
• Various clippy lints