message: change MenuContext type
diff: @@ -329,14 +329,16 @@ declare module '@primer/components' {
  tabName: string
  }
  - export const SelectMenu: React.FunctionComponent<SelectMenuProps> & {
  - MenuContext: React.FunctionComponent<{
  + export interface MenuContextInterface {
  selectedTab: string | undefined
  setSelectedTab: (selectedTab: string | undefined) => void,
  open: boolean | undefined,
  setOpen: (open: boolean | undefined) => void,
  initialTab: string | undefined
  - }>
  + }
  +
  + export const SelectMenu: React.FunctionComponent<SelectMenuProps> & {
  + MenuContext: MenuContextInterface
  Divider: React.FunctionComponent<SelectMenuDividerProps>
  Filter: React.FunctionComponent<SelectMenuFilterProps>
  Footer: React.FunctionComponent<SelectMenuFooterProps>
  