Bump smallvec to 1.0, release new minor version (0.27.2)

Author: Manishearth

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cssparser"
-version = "0.27.1"
+version = "0.27.2"
 authors = [ "Simon Sapin <simon.sapin@exyr.org>" ]
 
 description = "Rust implementation of CSS Syntax Level 3"
@@ -26,7 +26,7 @@ itoa = "0.4"
 matches = "0.1"
 phf = {version = "0.8", features = ["macros"]}
 serde = {version = "1.0", optional = true}
-smallvec = "0.6"
+smallvec = "1.0"
 
 [build-dependencies]
 syn = { version = "1", features = ["extra-traits", "fold", "full"] }