Update to support new versions of numpy

What's Changed

• Add Python 3.10, Remove 3.6 from CI by @AaronDJohnson in #197
• Attack of the clones: Empirical distribution fix for duplicate setup_sampler by @AaronDJohnson in #183
• Cover more priors with empirical distribution extension function by @AaronDJohnson in #184
• remove print statement by @AaronDJohnson in #198
• added ptmcmc version info by @astrolamb in #192
• Fix memory issues in Fp statistic by @AaronDJohnson in #188
• reformat .flake8 file by @AaronDJohnson in #202
• Fix HyperModel to work with newer versions of numpy.
• Allow manual specification of Tspan for models 1/2/3 in model.py by @vallis in #172
• increment version to 2.4.2 by @AaronDJohnson in #203
• update CI versions by @AaronDJohnson in #204

Full Changelog: v2.4.1...v2.4.2