Update to setup metadata including URL & dCA as maintainers (#105)

setup.py

@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+from pathlib import Path
+
 from setuptools import find_packages, setup
 
 from djangocms_snippet import __version__
@@ -35,6 +37,8 @@
     'Topic :: Software Development :: Libraries',
 ]
 
+this_directory = Path(__file__).parent
+long_description = (this_directory / "README.rst").read_text()
 
 setup(
     name='djangocms-snippet',
@@ -46,8 +50,10 @@
     url='https://github.com/django-cms/djangocms-snippet',
     license='BSD-3-Clause',
     description='Adds snippet plugin to django CMS.',
-    long_description=open('README.rst').read(),
-    packages=find_packages(),
+    long_description=long_description,
+    long_description_content_type='text/x-rst',
+    packages=find_packages(exclude=['tests']),
+    python_requires='>=3.5',
     include_package_data=True,
     zip_safe=False,
     install_requires=REQUIREMENTS,