Update Rust crate hyper to v1.8.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
hyper (source)	dependencies	minor	=1.7.0 -> =1.8.0

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Release Notes

hyperium/hyper (hyper)

v1.8.0

Compare Source

Bug Fixes

• http1: fix rare missed write wakeup on connections (#​3952) (2377b893)
• http2: fix internals of HTTP/2 CONNECT upgrades (#​3967) (58e0e7dc, closes #​3966)

Features

• rt: add Timer::now() method to allow overriding the instant returned (#​3965) (5509ebe6)

Breaking Changes

• The HTTP/2 client connection no longer allows an executor
  that can not spawn itself.

  This was an oversight originally. The client connection will now include spawning
  a future that keeps a copy of the executor to spawn other futures. Thus, if it is
  !Send, it needs to spawn !Send futures. The likelihood of executors that match
  the previously allowed behavior should be very remote.

  There is also technically a semver break in here, which is that the
  Http2ClientConnExec trait no longer dyn-compatible, because it now expects to
  be Clone. This should not break usage of the conn builder, because it already
  separately had E: Clone bounds. If someone were using dyn Http2ClientConnExec,
  that will break. However, there is no purpose for doing so, and it is not usable
  otherwise, since the trait only exists to propagate bounds into hyper. Thus, the
  breakage should not affect anyone.
  (58e0e7dc)

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