Bump Pygments versions.

Notably this adds support for the async / await syntax in Python 3.5+.

Fix #1865.

Author: aaugustin

readthedocs/doc_builder/python_environments.py

@@ -98,7 +98,7 @@ def setup_base(self):
     def install_core_requirements(self):
         requirements = [
             'sphinx==1.3.5',
-            'Pygments==2.0.2',
+            'Pygments==2.1.3',
             'setuptools==20.1.1',
             'docutils==0.12',
             'mkdocs==0.15.0',
@@ -189,7 +189,7 @@ def install_core_requirements(self):
         # Use conda for requirements it packages
         requirements = [
             'sphinx==1.3.5',
-            'Pygments==2.0.2',
+            'Pygments==2.1.3',
             'docutils==0.12',
             'mock',
             'pillow==3.0.0',