Archi

- (wheels) Upgrade bundled libarchive to [v3.4.3](https://github.com/libarchive/libarchive/releases/tag/v3.4.3)

- (wheels) Upgrade bundled libarchive to [v3.4.2](https://github.com/libarchive/libarchive/releases/tag/v3.4.2)
- (wheels) Build macOS wheels on macOS 10.14 (https://github.com/whtsky/archi/pull/6)

- (wheels) Upgrade bundled libarchive to [v3.4.1](https://github.com/libarchive/libarchive/releases/tag/v3.4.1)

- Add support for libarchive's `ARCHIVE_FAILED` error
- use PyMem_Malloc & PyMem_Free instead of alloca

- Fix binary wheels for macOS

TODO

- [ ] compression
- [ ] build wheels for Windows: https://discuss.python.org/t/need-auditwheel-like-utility-for-other-platforms/2028 , https://discuss.python.org/t/packaging-dlls-on-windows/1401