Update var name

Author: fabaff

setup.py

@@ -14,16 +14,16 @@
 
 here = os.path.abspath(os.path.dirname(__file__))
 
-with open(os.path.join(here, 'README.rst'), encoding='utf-8') as f:
-    long_description = f.read()
+with open(os.path.join(here, 'README.rst'), encoding='utf-8') as readme_file:
+    long_description = readme_file.read()
 
 if sys.argv[-1] == 'publish':
     os.system('python3 setup.py sdist upload')
     sys.exit()
 
 setup(
     name='luftdaten',
-    version='0.3.4',
+    version='0.4.0',
     description='Python API for interacting with luftdaten.info.',
     long_description=long_description,
     url='https://github.com/fabaff/python-luftdaten',