Release stable master as 2.0.1 (#224)

diff --git a/lib/src/version.dart b/lib/src/version.dart
index fd7256d..3c1cf56 100644
--- a/lib/src/version.dart
+++ b/lib/src/version.dart
@@ -1,2 +1,2 @@
 /// The current version of markdown.
-final String version = '2.0.1-dev';
+final String version = '2.0.1';
diff --git a/pubspec.yaml b/pubspec.yaml
index b4423a9..420af6b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 2.0.1-dev
+version: 2.0.1
 author: Dart Team <misc@dartlang.org>
 description: A library for converting markdown to HTML.
 homepage: https://github.com/dart-lang/markdown