message: add AvatarPair type, update AvatarStack type
diff: @@ -101,6 +101,10 @@ declare module '@primer/components' {
  export const Avatar: React.FunctionComponent<AvatarProps>
  + export interface AvatarPairProps extends PositionComponentProps, Omit<React.HTMLAttributes<HTMLDivElement>, 'color'> {}
  +
  + export const AvatarPair: React.FunctionComponent<AvatarPairProps>
  +
  export interface BaseStylesProps extends TypographyProps, CommonProps {}
  export const BaseStyles: React.FunctionComponent<BaseStylesProps>
  @@ -483,8 +487,7 @@ declare module '@primer/components' {
  export const LabelGroup: React.FunctionComponent<LabelGroupProps>
  export interface AvatarStackProps extends CommonProps, Omit<React.HTMLAttributes<HTMLSpanElement>, 'color'> {
  - alignRight?: boolean,
  - square?: boolean
  + alignRight?: boolean
  }
  export const AvatarStack: React.FunctionComponent<AvatarStackProps>
  @@ -555,6 +558,11 @@ declare module '@primer/components/lib/Avatar' {
  export default Avatar
  }
  +declare module '@primer/components/lib/AvatarPair' {
  + import {AvatarPair} from '@primer/components'
  + export default AvatarPair
  +}
  +
  declare module '@primer/components/lib/Details' {
  import {Details} from '@primer/components'
  export default Details
  