Auto merge of #13190 - servo:cssparser-up, r=Manishearth

Update cssparser

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components/script/Cargo.toml

@@ -27,7 +27,7 @@ bitflags = "0.7"
 canvas_traits = {path = "../canvas_traits"}
 caseless = "0.1.0"
 cookie = {version = "0.2.5", features = ["serialize-rustc"]}
-cssparser = {version = "0.6", features = ["heap_size", "serde-serialization"]}
+cssparser = {version = "0.7", features = ["heap_size", "serde-serialization"]}
 devtools_traits = {path = "../devtools_traits"}
 encoding = "0.2"
 euclid = "0.10.1"