list the LICENSE as a license_file

Data files are installed in the wrong directory when packaging this,
and it is very uncommon to do so. data files should be files needed
for the runtime only.

Author: dirkmueller

setup.py

@@ -83,7 +83,7 @@ def get_install_requirements(path):
       ext_modules=[module],
       packages=find_packages('src'),
       package_dir={'': 'src'},
-      data_files=[('', [os.path.join(work_dir, 'LICENSE.txt')])],
+      license_files=('LICENSE.txt', ),
       install_requires=INSTALL_REQUIRES,
       classifiers=trove_classifiers,
       extras_require={