workflow v0.11.5

New Features

• Enable increasing and decreasing computing threads.
• Support HTTP authentication.
• Support preadv/pwritev file IO task on macOS.
• Graph task supports canceling node's successors.

Improvements

• Decreasing handler threads dynamicly when using wait group or WFFuture.
• Enable CommSession::push() on an active session.

Bug Fixes

• Fix SSL_write error bug when sending large message.
• Fix push() bug when having message wrappers.
• Fix feedback() error of UDP client message.