updated version

Author: MicheleCotrufo

setup.py

@@ -9,7 +9,7 @@
     required_packages = f.read().splitlines()
 
 setuptools.setup(name='pdf2doi',
-      version='0.5',
+      version='0.6',
       description='A  python library/command-line tool to extract the DOI or other identifiers of a scientific paper from a pdf file, and to quickly and automatically generate BibTeX data.',
       long_description=long_description,
       long_description_content_type='text/markdown',