Update cargo-release config.

Author: romac

Cargo.toml

@@ -24,3 +24,14 @@ protobuf = { version = "^1.2.0", optional = true }
 [features]
 serialization-protobuf = [ "protobuf" ]
 
+[package.metadata.release]
+sign-commit = true
+upload-doc = true
+doc-branch = "gh-pages"
+pre-release-commit-message = "Release version {{version}}."
+pro-release-commit-message = "Start next development iteration {{version}}."
+tag-message = "Release version {{version}}."
+doc-commit-message = "Update documentation."
+dev-version-ext = "pre"
+
+