Hyper 0.14 support

[sunng87]

I was trying to use surf on tokio 1.0 executor. It seems the tokio library family needs to be upgraded to 1.0, including hyper 0.14 for this library.

[Fishrock123]

I think this is probably a breaking change. We'll be doing major releases Soon-ish(tm) but not quite yet. You may have to patch this yourself in the mean time...

[Carter12s]

Just bumping support for this issue. Transitively blocked issues:

• Surf Tokio 1.x Support
• Influxdb Tokio 1.x Support

Any timeline on "Soon-ish(tm)" or way I could help push forward?