message: add missing test for <Link muted>
diff: @@ -19,6 +19,10 @@ describe('Link', () => {
  expect(renderClasses(<Link scheme="gray-dark" />)).toContain('link-gray-dark')
  })
  + it('respects the "muted" prop', () => {
  + expect(renderClasses(<Link muted />)).toContain('muted-link')
  + })
  +
  it('respects the "nounderline" prop', () => {
  expect(renderClasses(<Link nounderline />)).toContain('no-underline')
  })
  