Preparing for release 16.0.0

[lizkenyon]

Description

Fixes #

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• What is the problem it is solving?
• What is the context of these changes?
• What is the impact of this PR?

How has this been tested?

Please, describe the tests that you ran to verify your changes.

Checklist:

• My commit message follow the pattern described in here
• I have performed a self-review of my own code.
• I have added tests that prove my fix is effective or that my feature works.
• I have updated the project documentation.
• I have added a changelog line.