When setting boolean attributes on Web Components
`<x-search somebool name={this.props.name} />`
they get rendered as attribute/value pairs instead
`<x-search somebool="true" name={this.props.name}>`

This causes problems with some AMP components, for eg. `<amp-iframe />` which has a `resizable` attribute that gets rendered as `resizable="true"`. This results in non valid AMP content and developers crying with blood tears on their keyboards :)
> The attribute 'resizable' in tag 'amp-iframe' is set to the invalid value 'true'. (see https://www.ampproject.org/docs/reference/components/amp-iframe)

Is there any reason for the current behaviour? Will changing this break something else?
});
    it('should validate against use of innerHTML', () => {
      expect(() =>
        mountComponent({innerHTML: '<span>Hi Jim!</span>'}),
      ).toErrorDev('Directly setting property `innerHTML` is not permitted. ');
    });
    it('should validate against use of innerHTML without case sensitivity', () => {
      expect(() =>
        mountComponent({innerhtml: '<span>Hi Jim!</span>'}),
      ).toErrorDev('Directly setting property `innerHTML` is not permitted. ');
    });
    it('should validate use of dangerouslySetInnerHTML', () => {
      expect(function() {
        mountComponent({dangerouslySetInnerHTML: '<span>Hi Jim!</span>'});
      }).toThrowError(
        '`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. ' +
          'Please visit https://reactjs.org/link/dangerously-set-inner-html for more information.',
      );
    });
    it('should validate use of dangerouslySetInnerHTML', () => {
      expect(function() {
        mountComponent({dangerouslySetInnerHTML: {foo: 'bar'}});
      }).toThrowError(
        '`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. ' +
          'Please visit https://reactjs.org/link/dangerously-set-inner-html for more information.',
      );
    });
    it('should allow {__html: null}', () => {
      expect(function() {
        mountComponent({dangerouslySetInnerHTML: {__html: null}});