build: Add numpy as a dependency explicitly

[matthewfeickert]

Description

Add numpy explicitly as a dependency of pyhf. As the lower bound (and upper bound) of numpy is tightly controlled by scipy a lower bound is not given to avoid potential future confusion for pip's dependency resolver. Explicitly adding numpy as a dependency improves the metadata for packaging. e.g. pip show will now list numpy under the 'Requires' output.

Note that no more information is contained with this addition, but it provides additional context to metadata inspection.

Before

$ python -m pip show pyhf             
Name: pyhf
Version: 0.7.1.dev5
Summary: pure-Python HistFactory implementation with tensors and autodiff
Home-page: https://github.com/scikit-hep/pyhf
Author: Lukas Heinrich, Matthew Feickert, Giordon Stark
Author-email: lukas.heinrich@cern.ch, matthew.feickert@cern.ch, gstark@cern.ch
License: Apache
Location: /home/feickert/.pyenv/versions/3.10.6/envs/pyhf-dev-CPU/lib/python3.10/site-packages
Requires: click, jsonpatch, jsonschema, pyyaml, scipy, tqdm
Required-by: 

This PR

$ python -m pip show pyhf    
Name: pyhf
Version: 0.7.1.dev6
Summary: pure-Python HistFactory implementation with tensors and autodiff
Home-page: https://github.com/scikit-hep/pyhf
Author: Lukas Heinrich, Matthew Feickert, Giordon Stark
Author-email: lukas.heinrich@cern.ch, matthew.feickert@cern.ch, gstark@cern.ch
License: Apache
Location: /home/feickert/.pyenv/versions/3.10.6/envs/pyhf-dev-CPU/lib/python3.10/site-packages
Requires: click, jsonpatch, jsonschema, numpy, pyyaml, scipy, tqdm
Required-by: 

Checklist Before Requesting Reviewer

• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

• Summarize commit messages into a comprehensive review of the PR

* Add numpy explicitly as a dependency of pyhf. As the lower bound (and upper bound)
  of numpy is tightly controlled by scipy a lower bound is not given to avoid potential
  future confusion for pip's dependency resolver. Explicitly adding numpy as a dependency
  improves the metadata for packaging. e.g. `pip show` will now list numpy under the
  'Requires' output.

[codecov]

Codecov Report

Base: 98.30% // Head: 98.30% // No change to project coverage 👍

Coverage data is based on head (8c0b95f) compared to base (eac527e).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2041   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          69       69           
  Lines        4530     4530           
  Branches      645      645           
=======================================
  Hits         4453     4453           
  Misses         45       45           
  Partials       32       32           

Flag	Coverage Δ
contrib	27.52% <ø> (ø)
doctest	61.14% <ø> (ø)
unittests-3.10	96.31% <ø> (ø)
unittests-3.7	96.28% <ø> (ø)
unittests-3.8	96.33% <ø> (ø)
unittests-3.9	96.35% <ø> (ø)

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