fixed typo

Author: ThHanke

setup.py

@@ -11,7 +11,7 @@
 with open(path.join(here, "README.md"), encoding="utf-8") as f:
     long_description = f.read()
 
-with open(path.join(here,"requirements.txt") as f:
+with open(path.join(here,"requirements.txt")) as f:
     requirements = f.read().splitlines()
 
 setup(