Release v0.8.6

What's Changed

• utf8 path by @qicosmos in #488
• add some methods by @qicosmos in #489
• remove u8path by @qicosmos in #490
• fix ws by @qicosmos in #492
• [no ci]update doc by @qicosmos in #493
• [no ci]fix doc by @qicosmos in #494
• clean some code by @qicosmos in #495
• add unit tests and remove some code by @qicosmos in #496
• Additional tests by @EmployeeNo427 in #498

Full Changelog: v0.8.5...v0.8.6