Update python package versions

requirements.txt

-requests==2.2.0
+requests==2.12.4
 
 # Testing
-coverage==3.7.1
+coverage==4.3.1
 ddt==1.1.1
-nose==1.3.3
-httpretty==0.8.0
+nose==1.3.7
+httpretty==0.8.14
 pep8==1.7.0
-pylint==1.5.0
-pep257==0.4.1
-mock==1.0.1
-testfixtures==4.0.0
+pylint==1.6.4
+pep257==0.7.0
+mock==2.0.0
+testfixtures==4.13.3

setup.py

@@ -8,14 +8,14 @@ setup(
     description='Client used to access edX analytics data warehouse',
     long_description=open('README.rst').read(),
     install_requires=[
-        "requests==2.2.0",
+        "requests==2.12.4",
     ],
     tests_require=[
-        "coverage==3.7.1",
-        "nose==1.3.3",
-        "httpretty==0.8.0",
-        "pep8==1.5.7",
-        "pylint==1.2.1",
-        "pep257==0.3.2"
+        "coverage==4.3.1",
+        "nose==1.3.7",
+        "httpretty==0.8.14",
+        "pep8==1.7.0",
+        "pylint==1.6.4",
+        "pep257==0.7.0"
     ]
 )