Update twine version

Author: mdmintz

setup.py

@@ -35,7 +35,7 @@
         os.system('rm -f dist/*.egg; rm -f dist/*.tar.gz; rm -f dist/*.whl')
         os.system('python setup.py sdist bdist_wheel')  # Create new tar/wheel
         print("\n*** Installing twine: *** (Required for PyPI uploads)\n")
-        os.system("python -m pip install 'twine>=1.14.0'")
+        os.system("python -m pip install 'twine>=1.15.0'")
         print("\n*** Publishing The Release to PyPI: ***\n")
         os.system('python -m twine upload dist/*')  # Requires ~/.pypirc Keys
         print("\n*** The Release was PUBLISHED SUCCESSFULLY to PyPI! :) ***\n")