[ADD] Postgres 16 Support

[oskardotglobal]

After the chaos in #17 I decided to just PR this myself.
I'll have to make some changes, but this should be ready to go soon.

[pleirb]

After the chaos in #17 I decided to just PR this myself. I'll have to make some changes, but this should be ready to go soon.

Thank you so much !
Will this soon be available in the doodba-copier-template project as well?

[oskardotglobal]

Once this is merged that will definitely be possible, but I will not PR those changes myself as I don't use that template.

[bosd]

@oskardotglobal Can you clean up this pr? Please remove unnessecary commits.
Please keep V14
& squash the commits? 🙏

[josep-tecnativa]

You could base your PR on this 8179fde as it is analogous to what you want to do, but with Postgres 15.

[oskardotglobal]

@bosd I will squash the commits. I seem to have removed V14 accidentally, I will readd this.

@josep-tecnativa Thank you for the suggestion, but I think moving the build steps to actions from the python scripts is a much cleaner solution. I will still update the tests accordingly.