1.5.0

• Fixed issues

  • #264: future::error() interface is odd
  • #260: set_exception() should be a const member.
  • #248: Lifetime of receivers returned by operator|
  • #243: Vector of move only type passed to continuation fails to compile.

• Enhancements

  • #269: Extend the default_executor with high and low priority
  • #262: system_timer interface is cumbersome. Now it accepts a
    duration from now. The previously available interface with a time_point is marked as deprecated and will be removed in a future release.