update SingleDatePicker prop types

types/react-dates/index.d.ts

@@ -163,6 +163,7 @@ declare namespace ReactDates {
         hideKeyboardShortcutsPanel?: boolean,
         daySize?: number,
         isRTL?: boolean,
+        verticalSpacing?: number,
 
         // navigation related props
         navPrev?: string | JSX.Element,

types/react-dates/react-dates-tests.tsx

@@ -64,6 +64,7 @@ class SingleDatePickerFullTest extends React.Component {
                     orientation="horizontal"
                     monthFormat="MM"
                     renderDayContents={day => day.toString()}
+                    verticalSpacing={4}
                     />
     }
 }