Add IMGUI_NODE_EDITOR_VERSION and IMGUI_NODE_EDITOR_VERSION_NUM.

Author: thedmd

Diff for: imgui_node_editor.h

@@ -20,6 +20,11 @@
 # include <utility> // std::move
 
 
+//------------------------------------------------------------------------------
+# define IMGUI_NODE_EDITOR_VERSION      "0.9.2"
+# define IMGUI_NODE_EDITOR_VERSION_NUM  000902
+
+
 //------------------------------------------------------------------------------
 namespace ax {
 namespace NodeEditor {