Bump version to 0.6.3

Author: adamgreig

Cargo.toml

@@ -11,7 +11,7 @@ license = "MIT OR Apache-2.0"
 name = "cortex-m"
 readme = "README.md"
 repository = "https://github.com/rust-embedded/cortex-m"
-version = "0.6.2"
+version = "0.6.3"
 edition = "2018"
 links = "cortex-m"  # prevent multiple versions of this crate to be linked together