Fix coverage dependency issue

Author: nbhambhani

requirements.txt

@@ -3,9 +3,10 @@ future>=0.16.0
 requests>=2.13.0
 mock>=2.0.0
 requests_oauthlib>=1.0.0
+coverage==4.0.3
 python-coveralls>=2.9.0
 pytest>=3.8.0
-pytest-cov<2.6.0
+pytest-cov==2.5.0
 six>=1.10.0
 enum34>=1.1.5
 

setup.py

@@ -35,9 +35,10 @@
         'requests>=2.13.0',
         'mock>=2.0.0',
         'requests_oauthlib>=1.0.0',
+        'coverage==4.0.3',
         'python-coveralls>=2.9.0',
         'pytest>=3.8.0',
-        'pytest-cov<2.6.0',
+        'pytest-cov==2.5.0',
         'six>=1.10.0',
         'enum34>=1.1.5',
     ],