[flutter_markdown]: Release v0.6.6 (#453)

diff --git a/packages/flutter_markdown/CHANGELOG.md b/packages/flutter_markdown/CHANGELOG.md
index 2278f42..0c9d26f 100644
--- a/packages/flutter_markdown/CHANGELOG.md
+++ b/packages/flutter_markdown/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.6
+
+ * Soft line break
+
 ## 0.6.5
 
  * Fix unique Keys for RichText blocks
diff --git a/packages/flutter_markdown/pubspec.yaml b/packages/flutter_markdown/pubspec.yaml
index 157f26d..51a8b84 100644
--- a/packages/flutter_markdown/pubspec.yaml
+++ b/packages/flutter_markdown/pubspec.yaml
@@ -4,7 +4,7 @@
   formatted with simple Markdown tags.
 repository: https://github.com/flutter/packages/tree/master/packages/flutter_markdown
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_markdown%22
-version: 0.6.5
+version: 0.6.6
 
 environment:
   sdk: ">=2.12.0 <3.0.0"