Update README.md

Author: holiber

README.md

@@ -93,7 +93,7 @@ You can get the list of `ISlTreeNode` from the computed `slVueTree.nodes` proper
 | edgeSize         | Number             | 3                      | Offset in pixels from top and bottom for folder-node element. While dragging cursor is in that offset, the dragging node will be placed before or after the folder-node instead of being placed inside the folder. |
 | scrollAreaHeight | Number             | 70                     | Offset in pixels from top and bottom for the component element. While dragging cursor is in that area, the scrolling starts.                                                                                |
 | maxScrollSpeed   | Number             | 20                     | The scroll speed is relative to the cursor position. Defines the max scroll speed.             
-| multiselectKey   | string|string[]    | ['ctrlKey', 'metaKey'] | The keys for multiselect mode. Allowed values are ['ctrlKey', 'metaKey', 'altKey']   
+| multiselectKey   | ['ctrlKey', 'metaKey'] | The keys for multiselect mode. Allowed values are ['ctrlKey', 'metaKey', 'altKey']   
 
 # Computed props