Release v0.8.7

What's Changed

• type alias by @qicosmos in #499
• Benchmark2 by @qicosmos in #502
• implement cookie and session by @ptbxzrt in #500
• Pipeling by @qicosmos in #503
• improve response content type by @qicosmos in #504
• Add missed header by @qicosmos in #506
• support gzip by @qicosmos in #507
• improve by @qicosmos in #508
• improve by @qicosmos in #510
• test by @qicosmos in #511
• fix by @qicosmos in #512
• don't move ws call back functions by @qicosmos in #513
• [coro_http_client][fix]init ssl when connect by @qicosmos in #514

Full Changelog: v0.8.6...v0.8.7