update supported python version

Author: rharlev

setup.py

@@ -4,15 +4,16 @@
     name='jsonbox',
     description='Python wrapper for jsonbox.io',
     url='https://github.com/harlev/jsonbox-python',
-    version='0.1.3',
+    version='0.1.5',
     packages=['.'],
     license='MIT',
     long_description=open('README.md').read(),
     long_description_content_type="text/markdown",
     install_requires=['requests'],
-    python_requires='==2.7.*',
+    python_requires='>=2.7',
     classifiers=[
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
     ],
 )