v0.7.0

What's Changed

• Use Pin in def of OpCode. by @Berrysoft in https://github.com/Berrysoft/compio/pull/54
• Add allocator_api support. by @Berrysoft in https://github.com/Berrysoft/compio/pull/56
• Make EventHandle owns the fd. by @Berrysoft in https://github.com/Berrysoft/compio/pull/58
• Simplify syscalls by @Berrysoft in https://github.com/Berrysoft/compio/pull/59
• Use ArrayVec if possible. by @Berrysoft in https://github.com/Berrysoft/compio/pull/60
• Make driver safe by @Berrysoft in https://github.com/Berrysoft/compio/pull/61
• Reduce overlapped alloc by @Berrysoft in https://github.com/Berrysoft/compio/pull/62
• Make cancelled op return by @Berrysoft in https://github.com/Berrysoft/compio/pull/63
• Add mid level API. by @Berrysoft in https://github.com/Berrysoft/compio/pull/65
• Try to use polling instead of mio. by @Berrysoft in https://github.com/Berrysoft/compio/pull/66
• Make polling available on Linux. by @Berrysoft in https://github.com/Berrysoft/compio/pull/68

Full Changelog: Berrysoft/compio@v0.6.0...v0.7.0