get the actual pinned requirements in setup.py

setup.py

@@ -8,8 +8,8 @@ HERE = os.path.dirname(os.path.abspath(__file__))
 
 
 def extract_requires():
-    """Get pinned requirements from requirements.in."""
+    """Get pinned requirements from requirements.txt."""
-    with open(os.path.join(HERE, 'requirements/requirements.in'), 'r') as reqs:
+    with open(os.path.join(HERE, 'requirements/requirements.txt'), 'r') as reqs:
         return [line.split(' ')[0] for line in reqs if not line[0] in ('-', '#')]