0.6.0

What's Changed

• fixing pattern guards by @zazedd in #1
• refactoring by @zazedd in #2
• compilation flags by @zazedd in #3
• let destructuring via let%mikmatch/%pcre by @zazedd in #4
• cleanup tyre, add ocamlformat, update opam desc by @zazedd in #5
• better substitution by @zazedd in #6

Full Changelog: v0.5.9...v0.6.0