chore: prepare tokio-util v0.6.4 (#3599)

Author: Darksonn

tokio-util/CHANGELOG.md

@@ -1,3 +1,20 @@
+# 0.6.4 (March 9, 2021)
+
+### Added
+
+- codec: `AnyDelimiter` codec ([#3406])
+- sync: add pollable `mpsc::Sender` ([#3490])
+
+### Fixed
+
+- codec: `LinesCodec` should only return `MaxLineLengthExceeded` once per line ([#3556])
+- sync: fuse PollSemaphore ([#3578])
+
+[#3406]: https://github.com/tokio-rs/tokio/pull/3406
+[#3490]: https://github.com/tokio-rs/tokio/pull/3490
+[#3556]: https://github.com/tokio-rs/tokio/pull/3556
+[#3578]: https://github.com/tokio-rs/tokio/pull/3578
+
 # 0.6.3 (January 31, 2021)
 
 ### Added

tokio-util/Cargo.toml

@@ -6,13 +6,13 @@ name = "tokio-util"
 #   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-util-0.6.x" git tag.
-version = "0.6.3"
+version = "0.6.4"
 edition = "2018"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-util/0.6.3/tokio_util"
+documentation = "https://docs.rs/tokio-util/0.6.4/tokio_util"
 description = """
 Additional utilities for working with Tokio.
 """