Merge pull request #1491 from plotly/stricten-1.18.1

stricten dcc version 1.14.1

Author: harryturr

requires-install.txt

@@ -2,7 +2,7 @@ Flask>=1.0.4
 flask-compress
 plotly
 dash_renderer==1.8.3
-dash-core-components>=1.14.0
+dash-core-components==1.14.1
 dash-html-components==1.1.1
 dash-table==4.11.1
 future