Added missing value to to types that supported in the documentation (#35172)

See: https://react-slick.neostack.com/docs/example/vertical-mode

types/react-slick/index.d.ts

@@ -3,6 +3,7 @@
 // Definitions by: Andrey Balokha <https://github.com/andrewBalekha>
 //                 Giedrius Grabauskas <https://github.com/GiedriusGrabauskas>
 //                 Andrew Makarov <https://github.com/r3nya>
+//                 Shannor Trotty <https://github.com/Shannor>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -81,6 +82,7 @@ export interface Settings {
     useTransform?: boolean;
     variableWidth?: boolean;
     vertical?: boolean;
+    verticalSwiping?: boolean;
     waitForAnimate?: boolean;
 }
 

types/react-slick/react-slick-tests.tsx

@@ -55,6 +55,7 @@ const defaultSettings: Settings = {
   useCSS: true,
   variableWidth: false,
   vertical: false,
+  verticalSwiping: false,
   waitForAnimate: true,
   afterChange: (currentSlide: number) => { },
   beforeChange: (currentSlide: number, nextSlide: number) => { },