fix ecometrica#21 cannot install with poetry

setup.py

@@ -4,36 +4,36 @@
 from setuptools import setup
 
 
-if sys.version_info < (3, 4):
-    install_requires = ['Django>=1.8,<2.0']
-else:
-    install_requires = ['Django>=1.8,!=2.0,!=2.0.1,!=2.0.2,!=2.0.3,!=2.0.4,!=2.0.5,!=2.0.6,!=2.0.7,!=2.0.8,!=2.0.9']
+install_requires = [
+    'Django>=1.8,<2.0;python_version<"3.4"',
+    'Django>=1.8,!=2.0,!=2.0.1,!=2.0.2,!=2.0.3,!=2.0.4,!=2.0.5,!=2.0.6,!=2.0.7,!=2.0.8,!=2.0.9; python_version>="3.4"',
+]
 
 
 setup(
-    name='django-hashedfilenamestorage',
-    version='2.4.1',
-    description=('A Django storage backend that names files by hash value.'),
-    long_description=open('README.rst', 'r').read(),
-    author='Ecometrica',
-    author_email='[email protected]',
-    url='http://github.com/ecometrica/django-hashedfilenamestorage/',
-    packages=['django_hashedfilenamestorage'],
+    name="django-hashedfilenamestorage",
+    version="2.4.1",
+    description=("A Django storage backend that names files by hash value."),
+    long_description=open("README.rst", "r").read(),
+    author="Ecometrica",
+    author_email="[email protected]",
+    url="http://github.com/ecometrica/django-hashedfilenamestorage/",
+    packages=["django_hashedfilenamestorage"],
     install_requires=install_requires,
     classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Environment :: Web Environment',
-        'Framework :: Django',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Topic :: Software Development :: Libraries',
+        "Development Status :: 5 - Production/Stable",
+        "Environment :: Web Environment",
+        "Framework :: Django",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: MIT License",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Topic :: Software Development :: Libraries",
     ],
     zip_safe=True,
-    tests_require=['pytest', 'tox']
+    tests_require=["pytest", "tox"],
 )