fix: Update with_aux to include_auxdata in pyhf v0.6.3+ API

[kratsg]

See scikit-hep/pyhf#1562 . This makes simplify compatible with more recent pyhf versions.

* Set minimum required pyhf version to v0.6.3
   - Set lower bound on pyhf instead of pinning
* Update API to be compatible with pyhf v0.6.3
   - Update iminuit API calls

[codecov-commenter]

Codecov Report

Merging #13 (4c122fb) into master (9b9245d) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #13   +/-   ##
=======================================
  Coverage   94.60%   94.60%           
=======================================
  Files           7        7           
  Lines         482      482           
  Branches       82       82           
=======================================
  Hits          456      456           
  Misses         23       23           
  Partials        3        3           

Impacted Files	Coverage Δ
src/simplify/fitter.py	100.00% <100.00%> (ø)
src/simplify/model_tools.py	100.00% <100.00%> (ø)
src/simplify/plot.py	100.00% <100.00%> (ø)
src/simplify/yields.py	100.00% <100.00%> (ø)

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[matthewfeickert]

@jackaraz @sabinekraml @WolfgangWaltenberger Are you able to try installing simplify from GitHub and give feedback on if this PR resolves all compatibility Issues that you're seeing so far? If so, then we can confirm with @eschanet and then make a new release.

[WolfgangWaltenberger]

had to add a file: 
src/simplify/_version.py
version="0.1.9" to make it work (perhaps somehow pip adds this automatically?). 
After this is it seems to work (though I only checked if it works "technically").

Wolfgang

[matthewfeickert]

had to add a file:  src/simplify/_version.py version="0.1.9" to make it work (perhaps somehow pip adds this automatically?).

Correct. Like pyhf, simplify uses setuptools_scm to generate the version number

simplify/pyproject.toml

Lines 5 to 6 in d551d26

	[tool.setuptools_scm]
	write_to = "src/simplify/_version.py"

If you pip install from the source locally or from GitHub

python -m pip install --upgrade "git+https://github.com/eschanet/simplify.git#egg=simplify"

pip and setuptools_scm will generate the file.

After this is it seems to work (though I only checked if it works "technically").

Cool, that seems to be good enough to motivate a new release then (after some small cleaning PRs).