fix(@clayui/button): fix error when using private name when generating declaration files

Relevant link:
* microsoft/TypeScript#6307 (comment)

Author: matuzalemsteles

packages/clay-autocomplete/src/Item.tsx

@@ -8,7 +8,7 @@ import ClayDropDown from '@clayui/drop-down';
 import fuzzy from 'fuzzy';
 import React from 'react';
 
-interface IProps extends React.ComponentProps<typeof ClayDropDown.Item> {
+export interface IProps extends React.ComponentProps<typeof ClayDropDown.Item> {
 	innerRef?: React.Ref<HTMLAnchorElement>;
 
 	/**

packages/clay-button/src/Group.tsx

@@ -7,7 +7,7 @@
 import classNames from 'classnames';
 import React from 'react';
 
-interface IButtonGroupProps extends React.HTMLAttributes<HTMLDivElement> {
+export interface IButtonGroupProps extends React.HTMLAttributes<HTMLDivElement> {
 	/**
 	 * Flag to indicate the spacing between the buttons.
 	 */

packages/clay-drop-down/src/DropDownWithItems.tsx

@@ -45,7 +45,7 @@ interface IDropDownContentProps {
 	items: Array<IItem>;
 }
 
-interface IProps extends IDropDownContentProps {
+export interface IProps extends IDropDownContentProps {
 	/**
 	 * Default position of menu element. Values come from `metal-position`.
 	 */

packages/clay-pagination/src/Item.tsx

@@ -7,7 +7,7 @@
 import classNames from 'classnames';
 import React from 'react';
 
-interface IPaginationItemProps
+export interface IPaginationItemProps
 	extends React.HTMLAttributes<HTMLAnchorElement | HTMLButtonElement> {
 	active?: boolean;
 	disabled?: boolean;