Cyaron

* 提高 graph.py 中 binary_tree() 的效率 by Sweetlemon68 (80)
* fixes 92 and restructure Vector.py by bzy-nya (94)
* Update math.py by houmy555809 (98)
* `fractions.gcd` -> `math.gcd` (84)

**Full Changelog**: https://github.com/luogu-dev/cyaron/compare/0.4.3...0.5.0

- Fix install requirements (73)
- Make sure formula in Sequence is callable (52)
- Support generating strings with RegExp (64)
- Fix some bug

Fix https://github.com/luogu-dev/cyaron/pull/46

- Support DAG generation https://github.com/luogu-dev/cyaron/pull/45
- Fixed filename generation issue https://github.com/luogu-dev/cyaron/pull/44

Fix incorrect behavior in Compare (Breaking Change)

Add `Edge.unweighted_edge` https://github.com/luogu-dev/cyaron/pull/34