ref: Update pytest requirements (getsentry#1224)

Author: ashwoods

setup.py

@@ -73,14 +73,12 @@
     'logbook',
     'mock',
     'nose',
-    'pycodestyle',
     'pytz',
     'pytest>=3.2.0,<3.3.0',
-    'pytest-timeout==1.2.0',
+    'pytest-timeout==1.2.1',
     'pytest-xdist==1.18.2',
-    'pytest-pythonpath==0.7.1',
-    'pytest-sugar==0.9.0',
-    'pytest-cov',
+    'pytest-pythonpath==0.7.2',
+    'pytest-cov==2.5.1',
     'pytest-flake8==1.0.0',
     'requests',
     'tornado>=4.1,<5.0',