Add versioning tags to repo

[waldobronchart]

May I suggest you add versioning tags to this repo? I would do a pull request for you but, I don't think I can create tags through a pr.

This will help with knowing which version of the code that a person has in their project, when using a package manager like UPM

Looking through the changelog, and using semver versioning logic, I established the following version tags:

if you run the following git command, you can generate the tags as I did above:

git tag v3.0.0 fbc442b
git tag v4.0.0 846ca8d
git tag v4.1.0 64f113b
git tag v4.2.0 4a62c09
git tag v4.3.0 68cce51
git tag v4.4.0 2ab789d
git tag v4.5.0 a13f411
git tag v4.6.0 975804e
git tag v4.7.0 75fd269
git push --tags

And if the latest is ready for release, I suggest you tag it v4.7.1 (bump patch since it's all bug fixes in there)