Merge pull request #334 from GuillemGSubies/master

Install typing only for old python

setup.py

@@ -37,14 +37,14 @@ def get_long_description():
         'scipy',
         'six',
         'scikit-learn >= 0.18',
-        'typing',
         'graphviz',
         'tabulate>=0.7.7',
     ],
     extras_require={
         ":python_version<'3.5.6'": [
             'singledispatch >= 3.4.0.3',
         ],
+        ":python_version<'3.5'": ['typing'],
     },
     classifiers=[
         'Development Status :: 4 - Beta',