Update sphinx from 1.6.5 to 1.6.6 (#90)

pyup-bot · tony · commit f731988f80d6 · 2018-01-10T19:48:53.000-06:00
diff --git a/requirements/doc.txt b/requirements/doc.txt
@@ -1,4 +1,4 @@
 docutils==0.14
 releases==1.4.0 # updated from 1.3.1
-sphinx==1.6.5
+sphinx==1.6.6
 alagitpull==0.0.14
