fix: narrow down types of string literals in a few defaultProps declarations (#22686)

components/button/button.tsx

@@ -120,7 +120,7 @@ class Button extends React.Component<ButtonProps, ButtonState> {
     loading: false,
     ghost: false,
     block: false,
-    htmlType: 'button',
+    htmlType: 'button' as ButtonProps['htmlType'],
   };
 
   private delayTimeout: number;

components/collapse/Collapse.tsx

@@ -40,7 +40,7 @@ export default class Collapse extends React.Component<CollapseProps, any> {
 
   static defaultProps = {
     bordered: true,
-    expandIconPosition: 'left',
+    expandIconPosition: 'left' as CollapseProps['expandIconPosition'],
   };
 
   renderExpandIcon = (panelProps: PanelProps = {}, prefixCls: string) => {

components/progress/progress.tsx

@@ -43,14 +43,14 @@ export interface ProgressProps {
 
 export default class Progress extends React.Component<ProgressProps> {
   static defaultProps = {
-    type: 'line',
+    type: 'line' as ProgressProps['type'],
     percent: 0,
     showInfo: true,
     // null for different theme definition
     trailColor: null,
-    size: 'default',
+    size: 'default' as ProgressProps['size'],
     gapDegree: undefined,
-    strokeLinecap: 'round',
+    strokeLinecap: 'round' as ProgressProps['strokeLinecap'],
   };
 
   getPercentNumber() {

components/tabs/TabBar.tsx

@@ -12,7 +12,7 @@ import { ConfigConsumerProps, ConfigConsumer } from '../config-provider';
 export default class TabBar extends React.Component<TabsProps> {
   static defaultProps = {
     animated: true,
-    type: 'line',
+    type: 'line' as TabsProps['type'],
   };
 
   renderTabBar = ({ direction }: ConfigConsumerProps) => {

components/timeline/Timeline.tsx

@@ -21,7 +21,7 @@ export default class Timeline extends React.Component<TimelineProps, any> {
 
   static defaultProps = {
     reverse: false,
-    mode: '',
+    mode: '' as TimelineProps['mode'],
   };
 
   renderTimeline = ({ getPrefixCls, direction }: ConfigConsumerProps) => {

components/tree/DirectoryTree.tsx

@@ -39,7 +39,7 @@ function getTreeData({ treeData, children }: DirectoryTreeProps) {
 class DirectoryTree extends React.Component<DirectoryTreeProps, DirectoryTreeState> {
   static defaultProps = {
     showIcon: true,
-    expandAction: 'click',
+    expandAction: 'click' as DirectoryTreeProps['expandAction'],
   };
 
   static getDerivedStateFromProps(nextProps: DirectoryTreeProps) {