React-components: Use own clipboard implementation

[donskov]

Fix #143

< 0.6.0

const Demo = () => {
  const {
    onCopy,
    hasCopied,
  } = useClipboard('Text to copy');

  return (
    <button
      type="button"
      onClick={onCopy}
    >
      {hasCopied ? 'Copied' : 'Click to copy'}
    </button>
  );
};

>= 0.6.0

const Demo = () => {
  const { copy, isCopied } = useClipboard();

  return (
    <button
      type="button"
      onClick={() => copy('Text to copy')}
    >
      {isCopied ? 'Copied' : 'Click to copy'}
    </button>
  );
};