Update beat-dev to include new packages for beat.editor

conda/beat-devel/meta.yaml

 package:
   name: beat-devel
-  version: 2018.04.26
+  version: 2018.04.30
 
 build:
   number: 0
@@ -23,6 +23,11 @@ requirements:
     - colorlog 3.1.4
     - oset 0.1.3
     - sphinxcontrib-programoutput 0.11
+    - nodejs 8.9.3
+    - flask 0.12.2
+    - flask-cors 3.0.3
+    - flask-restful 0.3.6
+    - enum34 1.1.6  # [py<34]
   run:
     - python
   run_constrained: