chore(release): release v0.7.1

Author: hyiso

Diff for: CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.7.1
+
+ - rule should pass if commit component raw is null (fix #18)
+
 ## 0.7.0
 
  - Support `references-empty` rule.

Diff for: pubspec.yaml

@@ -1,6 +1,6 @@
 name: commitlint_cli
 description: Commitlint lint commit messages to satisfy conventional commit format
-version: 0.7.0
+version: 0.7.1
 homepage: https://github.com/hyiso/commitlint
 documentation: https://hyiso.github.io/commitlint