Add production profile (#934)

* Add production profile

* Fix opt-level

* Update Cargo.toml

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Move opt-level to release

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

cumulus/Cargo.toml

@@ -41,3 +41,9 @@ members = [
 
 [profile.release]
 panic = "unwind"
+opt-level = 3
+
+[profile.production]
+inherits = "release"
+lto = true
+codegen-units = 1