message: Add url and classifiers to setup.py
diff: from skbuild import setup
  setup(
  - name="avogadro",
  + name='avogadro',
  use_scm_version=True,
  setup_requires=['setuptools_scm'],
  - description="Avogadro provides analysis and data processing useful in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas.",
  + description='Avogadro provides analysis and data processing useful in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas.',
  author='Kitware',
  - license="BSD",
  + license='BSD',
  + url='https://github.com/OpenChemistry/avogadrolibs',
  + classifiers=[
  + 'License :: OSI Approved :: BSD License',
  + 'Programming Language :: Python',
  + 'Programming Language :: C++',
  + 'Development Status :: 4 - Beta',
  + 'Intended Audience :: Developers',
  + 'Intended Audience :: Education',
  + 'Intended Audience :: Science/Research',
  + 'Topic :: Scientific/Engineering',
  + 'Topic :: Scientific/Engineering :: Information Analysis',
  + 'Topic :: Software Development :: Libraries',
  + 'Operating System :: Microsoft :: Windows',
  + 'Operating System :: Unix',
  + 'Operating System :: MacOS'
  + ],
  packages=['avogadro'],
  cmake_args=[
  '-DUSE_SPGLIB:BOOL=FALSE',
  