Making develop the default branch

[techsmyth]

Describe the background of your pull request

What does your pull request do? Does it solve a bug (which one?), add a feature?

Additional context

Add any other context

Governance

• [ ] Documentation is added
• [ ] Test cases are added or updated
• [ ] I've read the contributing document https://github.com/cherrytwist/.github/blob/master/CONTRIBUTING.md
• [ ] I've read and understand the Code of Conduct https://github.com/cherrytwist/.github/blob/master/CODE_OF_CONDUCT.md
• [ ] I understand that any contributions or suggestions I made may make it into the actual code. I've read the License https://github.com/cherrytwist/Coordination/blob/master/LICENSE and the contributor license agreement: tba