decap-cms@3.1.8

What's Changed

• Fix: Set correct branch when it's not specified in the config by @bytrangle in #5844
• fix(datetime-widget): revert default date format to include timezone by @demshy in #7165

Full Changelog: https://github.com/decaporg/decap-cms/compare/decap-cms@3.1.7...decap-cms@3.1.8