Radio buttons for modal

[yhatt]

Now <RadioButtonGroup> / <RadioButton> can use in <Modal> container! jsx-slack will no longer throw an error even if using <RadioButtonGroup> in modal.

<Modal title="Radio buttons for modal">
  <Actions>
    <RadioButtonGroup>
      <RadioButton value="a" description="Option A">A</RadioButton>
      <RadioButton value="b" description="Option B">B</RadioButton>
      <RadioButton value="c" description="Option C">C</RadioButton>
    </RadioButtonGroup>
  </Actions>

  <Section>
    Radio button group as <i>an accessory of &lt;Section&gt;</i>
    <RadioButtonGroup>
      <RadioButton value="a" description="Option A">A</RadioButton>
      <RadioButton value="b" description="Option B">B</RadioButton>
      <RadioButton value="c" description="Option C">C</RadioButton>
    </RadioButtonGroup>
  </Section>

  <Input label="Radio buttons in &lt;Input&gt;" name="input-block">
    <RadioButtonGroup>
      <RadioButton value="a" description="Option A">A</RadioButton>
      <RadioButton value="b" description="Option B">B</RadioButton>
      <RadioButton value="c" description="Option C">C</RadioButton>
    </RadioButtonGroup>
  </Input>

  <RadioButtonGroup label="Radio button group as input component" name="input-component">
    <RadioButton value="a" description="Option A">A</RadioButton>
    <RadioButton value="b" description="Option B">B</RadioButton>
    <RadioButton value="c" description="Option C">C</RadioButton>
  </RadioButtonGroup>
</Modal>

We've added a interface for input component too. User can migrate easily from <Select> / <Option> with just replacing component.

Resolves #88.

ToDo

• Allow using <RadioButtonGroup> in modal
• Add interface as an input component
• Fix existing tests
• Update documentation