feat: slider add bounces for iOS

doric-js/lib/src/widget/slider.d.ts

@@ -16,6 +16,7 @@ export declare class Slider extends Superview {
     onPageSlided?: (index: number) => void;
     loop?: boolean;
     scrollable?: boolean;
+    bounces?: boolean;
     private getItem;
     private renderBunchedItems;
     slidePage(context: BridgeContext, page: number, smooth?: boolean): Promise<any>;

doric-js/lib/src/widget/slider.js

@@ -84,6 +84,10 @@ __decorate([
     Property,
     __metadata("design:type", Boolean)
 ], Slider.prototype, "scrollable", void 0);
+__decorate([
+    Property,
+    __metadata("design:type", Boolean)
+], Slider.prototype, "bounces", void 0);
 export function slider(config) {
     const ret = new Slider;
     for (let key in config) {