Use dss-python==0.15.7

Pin dss-python==0.15.6 (0.15.5 was missing help files).

pyproject.toml: Adjust dss-python versions

Merge pull request #78 from dss-extensions/class_iterators

Class iterators and whole package update

Use `dss_python>=0.14.4`, increment version to 0.8.4.

Add CITATION.cff [skip ci]

Closes #123, closes #124.

setup.py: set dss_python to `0.14.*`; also set version to 0.8.2

This should fix installation with very old NumPy versions since NumPy 1.21 is now required for type annotation. We can adjust that later if there are any complaints.

We don't need to pin the explicit micro anymore, so let the user get the latest.

`dss_python==0.13.1` and set version to 0.8.1

README.md: updated several links and potentially confusing info (as o…

…f 2023).

Merge pull request #110 from dss-extensions/dss_python-0.12.0

DSS Python 0.12.1