Bump tokio-stream from 0.1.7 to 0.1.8

Bumps [tokio-stream](https://github.com/tokio-rs/tokio) from 0.1.7 to 0.1.8.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-stream-0.1.7...tokio-stream-0.1.8)

---
updated-dependencies:
- dependency-name: tokio-stream
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -33,7 +33,7 @@ rspotify = { version = "0.10.0", features = ["blocking"] }
 serde = "1.0"
 serde_json = "1.0"
 tokio = { version = "1", features = ["rt-multi-thread", "sync", "time"] }
-tokio-stream = "0.1.7"
+tokio-stream = "0.1.8"
 toml = "0.5"
 unicode-width = "0.1.9"
 dbus = { version = "0.9.5", optional = true }