Adjust min py version and requirements

Author: elacuesta

.gitignore

@@ -15,3 +15,4 @@ docs/_build
 .DS_Store
 pytestdebug.log
 .idea
+coverage.xml

requirements-test.txt

@@ -1,8 +1,6 @@
 mock
 vcrpy==1.10.3
-# FIXME remove the constraint after resolving
-# https://github.com/pytest-dev/pytest/issues/2966
-pytest<3.3.0
-pytest-cov<2.6.0
+pytest
+pytest-cov
 pytest-catchlog
 responses==0.10.6

setup.py

@@ -28,16 +28,13 @@
     package_data={'scrapinghub': ['VERSION']},
     install_requires=['requests>=1.0', 'retrying>=1.3.3', 'six>=1.10.0'],
     extras_require={'msgpack': mpack_required},
+    python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',