Release version 1.5.10

[dantaras]

Hi @hustf,

Could you please release version 1.5.10 of WebSockets? The only change not released from master is the HTTP.jl compat entry and it's holding us back from upgrading to HTTP.jl 1.0

Thank you!

[hustf]

We don't release the current master because it is not actually compatible with HTTP > v0.9.17.

The unreleased master, upon precompilation, complains:

Precompiling project...
  ✗ WebSockets
  3 dependencies successfully precompiled in 5 seconds. 13 already precompiled.
  1 dependency errored. To see a full report either run `import Pkg; Pkg.precompile()` or load the package
     Testing Running tests...
WARNING: could not import HTTP.handle into WebSockets
WARNING: could not import HTTP.Transaction into WebSockets

Pull requests welcome!

[dantaras]

Oh, I thought it's just a formality to release latest master. Didn't realise it's not actually compatible. I'll close this then. Thanks for responding.