fix: skeleton typing

Author: Viraj-10

src/components/composites/Skeleton/types.tsx

@@ -61,12 +61,12 @@ export interface ISkeletonTextProps extends IStackProps {
   /**
    * Stying for each line
    */
-  _line?: ISkeletonProps;
+  _line?: Partial<ISkeletonProps>;
 
   /**
    * Props to be passed to the Stack used inside.
    */
-  _stack?: IStackProps;
+  _stack?: Partial<IStackProps>;
 }
 
 export type ISkeletonComponentType = ((