Bump Jinja2 requirements

The 2.10.1 version was released 2019-04-06 and contains important security fix.
This change allows flask users to avoid implicit insecure dependency.

setup.py

@@ -35,7 +35,7 @@ setup(
     python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*',
     install_requires=[
         'Werkzeug>=0.14',
-        'Jinja2>=2.10',
+        'Jinja2>=2.10.1',
         'itsdangerous>=0.24',
         'click>=5.1',
     ],