[tokio-stream] needs dev-dependency so tests can run

[werdahias]

Version
Latest (0.1.16)

When updating tokio-stream to 0.1.16 in Debian I discovered that apparently tokio-stream has a missing dev-dependency on tokio-test.
E.g. tests/stream_collect.rs has use tokio_test::{... . However, the release on crates.io has no dependency on tokio-test, causing the tests to fai. Adding a patch for a -dev-dependency on tokio-test makes all tests pass.

[werdahias]

I see that it's present in git, so I assume something in the release process went wrong here.

[Darksonn]

It's because tokio-stream did not specify a version for the tokio-test dependency. This has already been fixed by #6931.