resumption of the project

[AlexandreMaillot]

• Fix project for xml version
• Add test for generating docx
• Add test for function getAllTags
• Add function for get all tags

[PavelS0]

Thank you. I have uploaded a new version to pub.dev

[PavelS0]

I noticed that getTags currently only returns root tags. Is this done on purpose?

[AlexandreMaillot]

I noticed that is a github issues, someone ask to have the tags, so i added them.