Bump tokio from 1.8.2 to 1.9.0

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.8.2...tokio-1.9.0)

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

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

Cargo.lock

@@ -1009,9 +1009,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.8.2"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2602b8af3767c285202012822834005f596c811042315fa7e9f5b12b2a43207"
+checksum = "4b7b349f11a7047e6d1276853e612d152f5e8a352c61917887cc2169e2366b4c"
 dependencies = [
  "autocfg",
  "bytes",

helix-lsp/Cargo.toml

@@ -23,5 +23,5 @@ lsp-types = { version = "0.89", features = ["proposed"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 thiserror = "1.0"
-tokio = { version = "1.8", features = ["full"] }
+tokio = { version = "1.9", features = ["full"] }
 tokio-stream = "0.1.7"