Python-lancelot

adds:
- arm builds for pyflirt and pylancelot bindings
- py3.10 builds for pyflirt and pylancelot bindings

changes:
- upgrade to rust 2021

fixes:
- clippy lints
- bump deps

note: not published on cargo.io due to zydis-rs being pinned to a bugfix fork.

changes:
- all new clippy lints pass

changes:
- add readme for both lancelot-flirt and python-flirt
- match_flirt: also output unmatched functions so you can compute statistics easier

changes:
- ci: build python bindings for 3.6-3.9

changes:
- nothing, this is a ci dance

changes:
- ci: attempt to build win/macos python bindings on py3.6