v0.2.0

• Fixed a few false-attribution problems.
• Syntax highlight code snippets.
• Optimised Cackle's analysis speed ~4x faster.
• Added cargo subcommand. e.g. cackle cargo test.
• Supports running tests in sandbox.
• Sandbox config now supports making select directories writable.
• Support showing a backtrace of how an API usage location is reachable.
• Output from cargo build is now shown when running cackle check.
• Added automated config edit to exclude a path from an API.
• Binary releases now available on github.