Add util.dart to export and bump version for custom inline parsers

pkgs/markdown/lib/markdown.dart

diff --git a/pkgs/markdown/lib/markdown.dart b/pkgs/markdown/lib/markdown.dart
index 8b477d4..107daaf 100644
--- a/pkgs/markdown/lib/markdown.dart
+++ b/pkgs/markdown/lib/markdown.dart
@@ -12,3 +12,4 @@
 export 'src/html_renderer.dart';
 export 'src/inline_parser.dart';
 export 'src/version.dart';
+export 'src/util.dart';

pkgs/markdown/lib/src/version.dart

diff --git a/pkgs/markdown/lib/src/version.dart b/pkgs/markdown/lib/src/version.dart
index 5b5cb10..b9992bb 100644
--- a/pkgs/markdown/lib/src/version.dart
+++ b/pkgs/markdown/lib/src/version.dart
@@ -1,2 +1,2 @@
 /// The current version of markdown.
-final String version = '0.11.1';
+final String version = '0.11.2';