Bump once_cell from 1.8.0 to 1.9.0 (#423)

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.8.0 to 1.9.0.
- [Release notes](https://github.com/matklad/once_cell/releases)
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](https://github.com/matklad/once_cell/compare/v1.8.0...v1.9.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -1931,9 +1931,9 @@ checksum = "17b02fc0ff9a9e4b35b3342880f48e896ebf69f2967921fe8646bf5b7125956a"
 
 [[package]]
 name = "once_cell"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
+checksum = "da32515d9f6e6e489d7bc9d84c71b060db7247dc035bbe44eac88cf87486d8d5"
 
 [[package]]
 name = "opaque-debug"

lychee-bin/Cargo.toml

@@ -41,7 +41,7 @@ tokio = { version = "1.14.0", features = ["full"] }
 toml = "0.5.8"
 futures = "0.3.17"
 tokio-stream = "0.1.7"
-once_cell = "1.8.0"
+once_cell = "1.9.0"
 
 [dev-dependencies]
 assert_cmd = "2.0.2"

lychee-lib/Cargo.toml

@@ -45,7 +45,7 @@ percent-encoding = "2.1.0"
 async-stream = "0.3.2"
 jwalk = "0.6.0"
 cached = "0.26.2"
-once_cell = "1.8.0"
+once_cell = "1.9.0"
 thiserror = "1.0"
 futures = "0.3.18"