message: docs(button): add shape circle to story
diff: @@ -2,7 +2,7 @@ import { Meta, Props, Story, Preview } from '@storybook/addon-docs/blocks'
  import { withKnobs } from '@storybook/addon-knobs'
  import { withA11y } from '@storybook/addon-a11y'
  -import { knobButtonLoading } from '@venice/core/storybook/knobs'
  +import { knobButtonLoading, knobButtonSizes } from '@venice/core/storybook/knobs'
  import Button from './Button.vue'
  @@ -130,6 +130,46 @@ Buttons allow users to make some actions. You can add a `href` attr to use it as
  </Story>
  </Preview>
  +## Circle buttons
  +
  +<Preview>
  + <Story name="Circle" parameters={{ decorators: [withKnobs,withA11y] }} inline={true}>
  + {{
  + components: { Button },
  + props: {
  + isLoading: {
  + default: knobButtonLoading(),
  + },
  + size: {
  + default: knobButtonSizes(),
  + },
  + },
  + template: `
  + <div>
  + <div class="row-items">
  + <Button :isLoading="isLoading" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" color="primary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" color="secondary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" shape="circle" :size="size" disabled>@</Button>
  + </div>
  + <div class="row-items">
  + <Button :isLoading="isLoading" variant="outlined" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="outlined" color="primary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="outlined" color="secondary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="outlined" shape="circle" :size="size" disabled>@</Button>
  + </div>
  + <div class="row-items">
  + <Button :isLoading="isLoading" variant="text" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="text" color="primary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="text" color="secondary" shape="circle" :size="size">@</Button>
  + <Button :isLoading="isLoading" variant="text" shape="circle" :size="size" disabled>@</Button>
  + </div>
  + </div>
  + `,
  + }}
  + </Story>
  +</Preview>
  +
  ## With icons
  <Preview>
  