Fix content type and bump version

Author: ajinabraham

setup.py

@@ -312,9 +312,10 @@ def run(self):
 
 setup(
     name='yara-python-dex',
-    version='1.0.2',
+    version='1.0.3',
     description='Python interface for YARA',
     long_description=readme,
+    long_description_content_type='text/markdown',
     license='Apache 2.0',
     author='Victor M. Alvarez',
     author_email='[email protected], [email protected]',