Update package URL

Author: dweindl

setup.py

@@ -53,7 +53,7 @@ def absolute_links(txt):
       long_description_content_type="text/markdown",
       author='The PEtab developers',
       author_email='[email protected]',
-      url='https://github.com/PEtab-dev/PEtab',
+      url='https://github.com/PEtab-dev/libpetab-python',
       packages=find_packages(exclude=['doc*', 'test*']),
       install_requires=['numpy>=1.15.1',
                         'pandas>=1.2.0',