Release v0.5.2

I totally meant for v0.5.2 to be its own version and absolutely did not
forget to pull upstream before running `cargo publish` :>

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [v0.5.2] - 2019-12-15
+
+- Fix USB module docs
+
 ## [v0.5.1] - 2019-12-14
 
 ### Added
@@ -154,7 +158,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - First tagged version
 
-[Unreleased]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.5.1...HEAD
+[Unreleased]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.5.2...HEAD
+[v0.5.2]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.5.1...v0.5.2
 [v0.5.1]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.5.0...v0.5.1
 [v0.5.0]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.4.0...v0.5.0
 [v0.4.0]: https://github.com/stm32-rs/stm32f1xx-hal/compare/v0.3.0...v0.4.0

README.md

@@ -69,7 +69,7 @@ be specified as part of the `Cargo.toml` definition.
 
 ```toml
 [dependencies.stm32f1xx-hal]
-version = "0.5.1"
+version = "0.5.2"
 features = ["stm32f100", "rt"]
 ```