chore: prepare v0.6.21 release
This removes the `=` dependency on an older `cfg-if` version.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d2586a..556bd90 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 0.6.21 (November 27, 2019)
+
+### Fixed
+- remove `=` dependency on `cfg-if`.
+
# 0.6.20 (November 21, 2019)
### Fixed
diff --git a/Cargo.toml b/Cargo.toml
index 317a088..948df65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,11 +6,11 @@
# - Update CHANGELOG.md.
# - Update doc URL.
# - Create git tag
-version = "0.6.20"
+version = "0.6.21"
license = "MIT"
authors = ["Carl Lerche <me@carllerche.com>"]
description = "Lightweight non-blocking IO"
-documentation = "https://docs.rs/mio/0.6.20/mio/"
+documentation = "https://docs.rs/mio/0.6.21/mio/"
homepage = "https://github.com/carllerche/mio"
repository = "https://github.com/carllerche/mio"
readme = "README.md"
diff --git a/src/lib.rs b/src/lib.rs
index 2369e4c..1d2f500 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/mio/0.6.20")]
+#![doc(html_root_url = "https://docs.rs/mio/0.6.21")]
// Mio targets old versions of the Rust compiler. In order to do this, uses
// deprecated APIs.
#![allow(bare_trait_objects, deprecated, unknown_lints)]
