Merge pull request #709 from declension/359-upgrade-pygments

Use newer release of Pygments

Author: phadej

doc/requirements.txt

@@ -10,7 +10,7 @@ Jinja2==2.8
 livereload==2.4.1
 MarkupSafe==0.23
 pathtools==0.1.2
-Pygments==2.1.1
+Pygments==2.2.0
 pytz==2015.7
 PyYAML==3.11
 recommonmark==0.4.0