v0.4: cleaner, safer

Author: blandinw

Cargo.lock

@@ -7,6 +7,7 @@ authors = ["alcee"]
 cocoa = { git = "https://github.com/servo/core-foundation-rs" }
 core-foundation = { git = "https://github.com/servo/core-foundation-rs" }
 core-foundation-sys = { git = "https://github.com/servo/core-foundation-rs" }
-env_logger = ">=0.5"
-log = ">=0.4"
-objc = ">=0.2"
+objc = ">=0.2"
+
+[profile.release]
+lto = true