Add in constructor for label

leaflet-label/leaflet-label-tests.ts

@@ -67,6 +67,8 @@ path = path.unbindLabel();
 
 // Label
 
+label = new L.Label();
+
 label.setOpacity(0.7);
 label.updateZIndex(5);
 label.setLatLng(new L.LatLng(3, 3));

leaflet-label/leaflet-label.d.ts

@@ -58,6 +58,12 @@ declare module L {
 		zoomAnimation?: boolean;
 	}
 
+	export interface LabelStatic extends ClassStatic {
+		new(options?: LabelOptions): Label;
+	}
+
+	export var Label: LabelStatic;
+
 	export interface Label extends IEventPowered<Label> {
 		onAdd(map: Map): void;
 		onRemove(map: Map): void;