chore: update version metadata in setup.py

+ update the required Django version in docs/installation.rst

Author: asfaltboy

docs/installation.rst

@@ -29,7 +29,7 @@ Installation
 
 
 .. note::
-  You need to use ``Django>=1.7`` to be able to use this version of pipeline.
+  You need to use ``Django>=1.11`` to be able to use this version of pipeline.
 
 .. _GitHub: http://github.com/jazzband/django-pipeline
 .. _PyPI: http://pypi.python.org/pypi/django-pipeline

setup.py

@@ -24,21 +24,18 @@
         'Development Status :: 5 - Production/Stable',
         'Environment :: Web Environment',
         'Framework :: Django',
-        'Framework :: Django :: 1.6',
-        'Framework :: Django :: 1.7',
-        'Framework :: Django :: 1.8',
-        'Framework :: Django :: 1.9',
-        'Framework :: Django :: 1.10',
         'Framework :: Django :: 1.11',
+        'Framework :: Django :: 2.0',
+        'Framework :: Django :: 2.2',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Utilities',
         'Topic :: Software Development :: Libraries :: Python Modules',