Remove setup.py test_suites

Author: ifduyue

.github/workflows/test.yml

@@ -26,5 +26,6 @@ jobs:
 
       - name: Run tests
         run: |
-          python setup.py test
+          python setup.py build_ext --inplace
+          python -m unittest discover -vv tests
           ./bench.sh

setup.py

@@ -41,7 +41,6 @@ def readfile(filename):
     license='BSD',
     packages=['xxhash'],
     ext_package='xxhash',
-    test_suite='tests',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'License :: OSI Approved :: BSD License',