Auto merge of #18556 - Manishearth:cssparserup, r=emilio

Bump cssparser to 0.21.2

try: https://treeherder.mozilla.org/#/jobs?repo=try&revision=5efe06f4fdb11e540532b57368b78defb0bd7aa9

fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1401016

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components/style/Cargo.toml

@@ -36,7 +36,7 @@ atomic_refcell = "0.1"
 bitflags = "0.7"
 byteorder = "1.0"
 cfg-if = "0.1.0"
-cssparser = "0.21.1"
+cssparser = "0.21.2"
 encoding = {version = "0.2", optional = true}
 euclid = "0.15"
 fallible = { path = "../fallible" }