Bump to 6.0.1 (dart-lang/markdown#462)

pkgs/markdown/CHANGELOG.md

diff --git a/pkgs/markdown/CHANGELOG.md b/pkgs/markdown/CHANGELOG.md
index 95a80c5..9125fbe 100644
--- a/pkgs/markdown/CHANGELOG.md
+++ b/pkgs/markdown/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 6.0.1-dev
+## 6.0.1
 
 * Fix a crash in checkbox lists when mixing checkbox items with
   non-checkbox items.

pkgs/markdown/lib/src/version.dart

diff --git a/pkgs/markdown/lib/src/version.dart b/pkgs/markdown/lib/src/version.dart
index e3a5fe6..da01dc7 100644
--- a/pkgs/markdown/lib/src/version.dart
+++ b/pkgs/markdown/lib/src/version.dart
@@ -1,2 +1,2 @@
 // Generated code. Do not modify.
-const packageVersion = '6.0.1-dev';
+const packageVersion = '6.0.1';

pkgs/markdown/pubspec.yaml

diff --git a/pkgs/markdown/pubspec.yaml b/pkgs/markdown/pubspec.yaml
index ef7520c..ab02324 100644
--- a/pkgs/markdown/pubspec.yaml
+++ b/pkgs/markdown/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 6.0.1-dev
+version: 6.0.1
 
 description: A portable Markdown library written in Dart that can parse
  Markdown into HTML.