v1.8.9

What's Changed

• Update README.md by @JamieSlome in #27
• Fixes Future.done() behavior (resolves #24). by @rafa-be in #28
• Dynamically detect OS signal availability at use instead of import time. by @rafa-be in #30
• Skip unit test that hangs. by @rafa-be in #35
• Get rid of copy memory when receive and send message by @sharpener6 in #34

Full Changelog: v1.8.5...v1.8.9