Requests used by package but not in requirements.txt

[rstoneback]

Describe the bug Setting up a new python environment for pysatModels testing. Running pytest yields an error.

To Reproduce Steps to reproduce the behavior:

1. pytest -vs pysatModels

   ____________ ERROR collecting pysatModels/tests/test_utils_match.py ____________
   ImportError while importing test module '/Users/russellstoneback/Code/pysatModels/pysatModels/tests/test_utils_match.py'.
   Hint: make sure your test modules/packages have valid Python names.
   Traceback:
   ../../opt/anaconda3/envs/july2021/lib/python3.9/importlib/__init__.py:127: in import_module
   return _bootstrap._gcd_import(name[level:], package, level)
   pysatModels/__init__.py:20: in <module>
   from pysatModels import models  # noqa: F401
   pysatModels/models/__init__.py:15: in <module>
   from pysatModels.models import pydineof_dineof, sami2py_sami2  # noqa: F401
   pysatModels/models/pydineof_dineof.py:48: in <module>
   import requests
   E   ModuleNotFoundError: No module named 'requests'

Expected behavior Requests should be listed in requirements.txt, or , perhaps more accurately, test_requirements.txt

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: MacOS
• Version Python 3.9.5
• Other details about your setup that could be relevant

Additional context Add any other context about the problem here.

[jklenzing]

Closing with merge of #87