Fix PyPi package.

setup.cfg

@@ -0,0 +1,2 @@
+[metadata]
+description-file = README.md

setup.py

@@ -4,13 +4,12 @@ from setuptools import setup
 
 setup(
     name='pymisp',
-    version='1.1',
+    version='1.1.2',
     author='Raphaël Vinot',
     author_email='raphael.vinot@circl.lu',
     maintainer='Raphaël Vinot',
     url='https://github.com/MISP/PyMISP',
     description='Python API for MISP.',
-    long_description=open('README.md').read(),
     packages=['pymisp'],
     classifiers=[
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',