Fix missing splat in react-intl types (#25046)

types/react-intl/index.d.ts

@@ -142,7 +142,7 @@ declare namespace ReactIntl {
         interface Props extends MessageDescriptor {
             values?: {[key: string]: MessageValue | JSX.Element};
             tagName?: string;
-            children?: (formattedMessage: string[]) => React.ReactNode;
+            children?: (...formattedMessage: string[]) => React.ReactNode;
         }
     }
     class FormattedMessage extends React.Component<FormattedMessage.Props> { }

types/react-intl/react-intl-tests.tsx

@@ -150,6 +150,20 @@ class SomeComponent extends React.Component<SomeComponentProps & InjectedIntlPro
                 {(text) => <div className="messageDiv">{text}</div>}
             </FormattedMessage>
 
+            <FormattedMessage
+                id="test"
+                description="Test"
+            >
+                {(text) => <input placeholder={text} />}
+            </FormattedMessage>
+
+            <FormattedMessage
+                id="test"
+                description="Test"
+            >
+                {(...text) => <ul>{text.map(t => <li>{t}</li>)}</ul>}
+            </FormattedMessage>
+
             <FormattedHTMLMessage
                 id="test"
                 description="Test"