Publish 0.5.4 string cache codegen (#292)

Author: Ygg01

string-cache-codegen/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "string_cache_codegen"
-version = "0.5.3"  # Also update ../README.md when making a semver-breaking change
+version = "0.5.4"  # Also update ../README.md when making a semver-breaking change
 authors = [ "The Servo Project Developers" ]
 description = "A codegen library for string-cache, developed as part of the Servo project."
 license = "MIT OR Apache-2.0"