Support for Python 3.5+ only in package metdata (#212)

Author: leture

setup.py

@@ -29,6 +29,7 @@
     long_description_content_type = 'text/markdown',
     license = 'BSD',
     platforms = ['Any'],
+    python_requires='>=3.5',
     keywords = [
         'pyunit', 'unittest', 'junit xml', 'xunit', 'report', 'testrunner', 'xmlrunner'
     ],
@@ -40,8 +41,6 @@
         'Natural Language :: English',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',