Update CPAL to version 0.10.0.

[mitchmindtree]

This is quite a significant update for CPAL, including a number of
breaking changes. Here is a list of the major changes along with
links to where you can find more information:

• A Host API has been introduced in Introduce a Host API #289 along with a follow-up
  refactor in Refactor Host and related traits into a new traits module #295. Please see the examples for a demonstration of how
  to update your code. The necessary changes should hopefully be
  minimal. If this has caused you any major difficulty please let us
  know in an issue!
• An ASIO host has been introduced in Add ASIO Host for Windows (rebase and refactor of #221) #292. This adds support for
  Steinberg's ASIO audio driver API on Windows. Please see the ASIO
  section of the README for more information on how to setup CPAL with
  ASIO support for your project.
• The user callback API has been overhauled to emit StreamEvents
  rather than buffers in order to support handling stream errors. User Callback API StreamEvent Overhaul #288.
• Error handling in general was overhauled in Error Handling Overhaul #286. This meant taking
  advantage of the failure crate and adding support for
  backend-specific errors with custom messages. Many unnecessary
  panic!s have been removed, but a few remain that would indicate bugs
  in CPAL.

In general, checking out the updated examples will be the easiest way to
get a quick overview on how you can update your own code for these
changes.

The CHANGELOG.md has been updated to include these changes.

This PR also includes a few small changes that managed to slip through
the cracks in #289 and #295. Namely, Devices, SupportedInputFormats
and SupportedOutputFormats have been re-exported in the crate root.
The Hash implementation has also been re-added to the StreamId type
to avoid some potentially frustrating downstream breakage.