CI: pin pytables to valid build (pandas-dev#17760)

jreback · web-flow · commit 6d30d5f425dd · 2017-10-03T06:48:57.000-04:00
xref pandas-dev#17757
diff --git a/ci/requirements-3.6.run b/ci/requirements-3.6.run
@@ -7,7 +7,7 @@ xlsxwriter
 xlrd
 xlwt
 numexpr
-pytables
+pytables=3.4.2=np113py36_1
 matplotlib
 lxml
 html5lib
