message: Add flexShrink and flexGrow to FlexProps interface
diff: @@ -60,22 +60,7 @@ declare module '@primer/components' {
  StyledSystem.AlignSelfProps,
  StyledSystem.OrderProps {}
  - interface FlexProps
  - extends BaseProps,
  - CommonProps,
  - LayoutProps,
  - StyledSystem.FlexProps,
  - StyledSystem.JustifySelfProps,
  - StyledSystem.AlignSelfProps,
  - StyledSystem.OrderProps,
  - StyledSystem.FlexBasisProps,
  - StyledSystem.FlexDirectionProps,
  - StyledSystem.FlexWrapProps,
  - StyledSystem.AlignContentProps,
  - StyledSystem.AlignItemsProps,
  - StyledSystem.JustifyContentProps,
  - StyledSystem.JustifyItemsProps,
  - BoxProps {}
  + interface FlexProps extends BaseProps, CommonProps, LayoutProps, StyledSystem.FlexboxProps, BoxProps {}
  export const Flex: React.FunctionComponent<FlexProps> & {
  Item: React.FunctionComponent<FlexItemProps>
  