[Typography] Add primary option to color property

[eyn]

No description provided.

[oliviertassinari]

Can we update the typescript definition too? :)

[eyn]

I think (by chance!!) it is already included:

export interface TypographyProps extends React.HTMLAttributes<HTMLElement> {
  align?: PropTypes.Alignment;
  component?: React.ReactType;
  color?: PropTypes.Color | 'secondary';
  gutterBottom?: boolean;
  headlineMapping?: { [type in TextStyle]: string };
  noWrap?: boolean;
  paragraph?: boolean;
  type?: Style | 'caption' | 'button';
}

export namespace PropTypes {
  type Alignment = 'inherit' | 'left' | 'center' | 'right' | 'justify';
  type Color = 'inherit' | 'primary' | 'accent' | 'default';
  type Margin = 'none' | 'dense' | 'normal';
}

[oliviertassinari]

@eyn Thanks