Fixed DiagrammeR package name

DESCRIPTION

@@ -31,7 +31,7 @@ Suggests:
     visNetwork,
     d3heatmap,
     metricsgraphics,
-    diagrammeR
+    DiagrammeR
 Collate: 
     'i2dashboard.R'
     'AllGenerics.R'

R/vis_objects.R

@@ -94,7 +94,7 @@ setMethod("add_component",
 setMethod("add_component",
           signature = signature(dashboard = "i2dashboard", component = "grViz"),
           definition = function(dashboard, component, page = "default", title = NULL, ...) {
-            add_vis_object(dashboard, component, "diagrammeR", page, title, ...) })
+            add_vis_object(dashboard, component, "DiagrammeR", page, title, ...) })
 
 setMethod("add_component",
           signature = signature(dashboard = "i2dashboard", component = "gt_tbl"),