Exception when using with styled-components css prop

[likern]

When using styled-components css property, testID property is passed down to <Icon /> component, which leads to exception.

import 'styled-components/macro';
...
<Icon
 css={`
   margin-left: 14px;
 `}
  color={`${
    iconColor !== undefined ? iconColor : 'rgba(38, 47, 86, 1)'
  }`}
  icon={['far', iconName]}
  size={24}
/>

[github-actions]

Branch issue-127 created. Open it in the web editor.

[likern]

Because of #129 issue, don't pass testID down, just skip when it's passed and don't throw exception.