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

jreback · alanbato · commit c695871216c2 · 2017-11-10T17:14:52.000-06:00
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
