Bump version to 0.6.0

lib/frontend/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 authors = ["The Cretonne Project Developers"]
 name = "cretonne-frontend"
-version = "0.5.1"
+version = "0.6.0"
 description = "Cretonne IR builder helper"
 license = "Apache-2.0"
 documentation = "https://cretonne.readthedocs.io/"
@@ -9,7 +9,7 @@ repository = "https://github.com/cretonne/cretonne"
 readme = "README.md"
 
 [dependencies]
-cretonne-codegen = { path = "../codegen", version = "0.5.1", default-features = false }
+cretonne-codegen = { path = "../codegen", version = "0.6.0", default-features = false }
 
 [features]
 default = ["std"]