chore: prepare v0.2.21 release (#2530)

tokio/CHANGELOG.md

@@ -1,3 +1,20 @@
+# 0.2.21 (May 13, 2020)
+
+### Fixes
+
+- macros: disambiguate built-in `#[test]` attribute in macro expansion (#2503)
+- rt: `LocalSet` and task budgeting (#2462).
+- rt: task budgeting with `block_in_place` (#2502).
+- sync: release `broadcast` channel memory without sending a value (#2509).
+- time: notify when resetting a `Delay` to a time in the past (#2290).
+
+### Added
+- io: `get_mut`, `get_ref`, and `into_inner` to `Lines` (#2450).
+- io: `mio::Ready` argument to `PollEvented` (#2419).
+- os: illumos support (#2486).
+- rt: `Handle::spawn_blocking` (#2501).
+- sync: `OwnedMutexGuard` for `Arc<Mutex<T>>` (#2455).
+
 # 0.2.20 (April 28, 2020)
 
 ### Fixes

tokio/Cargo.toml

@@ -8,12 +8,12 @@ name = "tokio"
 #   - README.md
 # - Update CHANGELOG.md.
 # - Create "v0.2.x" git tag.
-version = "0.2.20"
+version = "0.2.21"
 edition = "2018"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 readme = "README.md"
-documentation = "https://docs.rs/tokio/0.2.20/tokio/"
+documentation = "https://docs.rs/tokio/0.2.21/tokio/"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
 description = """

tokio/src/lib.rs

@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/tokio/0.2.20")]
+#![doc(html_root_url = "https://docs.rs/tokio/0.2.21")]
 #![allow(
     clippy::cognitive_complexity,
     clippy::large_enum_variant,