Merge pull request #419 from MongoEngine/travis-update Travis updated to use focal ubuntu images

Bump version to 0.9.5 

Bump version to 0.9.4 

Bump version to 0.9.3 

version bump 

extra info in the changelog [ci skip] 

bump version to v0.9.0 now that py26 is not supported anymore 

version 0.8.2 + rely on six and not mongoengine.python_support 

Bump version to 0.8.1 

Version 0.8 candidate