update cargo.toml to v0.2.3 for release (see: #92)

Author: ryankurte

Cargo.toml

@@ -11,7 +11,7 @@ license = "MIT OR Apache-2.0"
 name = "embedded-hal"
 readme = "README.md"
 repository = "https://github.com/japaric/embedded-hal"
-version = "0.2.3-rc.1"
+version = "0.2.3"
 
 [dependencies.void]
 default-features = false