Updates version and documents changes

Consolidates subsequent commit version increases into one release.

Author: leonsenft

CHANGELOG.md

@@ -1,3 +1,14 @@
+## 0.13.3
+
+* Adds support for shadow host selectors `:host()` and `:host-context()`.
+* Adds support for shadow-piercing descendant combinator `>>>` and its alias
+  `/deep/` for backwards compatibility.
+* Adds support for non-functional IE filter properties (i.e. `filter: FlipH`)
+* Fixes emitted CSS for '@page' directive when body includes declarations and
+  page-margin boxes.
+* Exports `Message` from `parser.dart` so its no longer necessary to import
+  `src/messages.dart` to use the parser API.
+
 ## 0.13.2+2
 
 * Fix static warnings.

pubspec.yaml

@@ -1,5 +1,5 @@
 name: csslib
-version: 0.13.6
+version: 0.13.3
 author: Dart Team <[email protected]>
 description: A library for parsing CSS.
 homepage: https://github.com/dart-lang/csslib