Added Required Python Version (#152)

* Added Required Python Version

Added python_requires to specify the required python version for the library.

* Updated required python version

* Removed Classifiers for unsupported python versions

* Updated

Co-authored-by: Nirjas Jakilim <Nirzak@users.noreply.github.com>

setup.py

@@ -48,15 +48,14 @@
     include_package_data=True,
     zip_safe=False,
     license='MPL-2.0',
+    python_requires=">=3.5",
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)',
         'Natural Language :: English',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',