Make a stable branch pointing to the latest release for Binder

Signed-off-by: martinRenou <[email protected]>

Author: martinRenou

README.md

@@ -1,6 +1,6 @@
 # voila-material
 
-[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/voila-dashboards/voila-material/master?urlpath=voila)
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/voila-dashboards/voila-material/stable?urlpath=voila)
 
 Material design template for voila
 

environment.yml

@@ -4,4 +4,5 @@ channels:
 dependencies:
   - ipywidgets=7.5.1
   - bqplot
-  - voila=0.1.12
+  - voila=0.1.21
+  - voila-material=0.3.0