How to specify data type in html using attribute html

[PouriaSeyfi]

During HTML to Excel conversion, it is sometimes necessary to know what date type should be used :

                <table>
                    <tr>
                        <!-- boolean data type -->
                        <td data-type="b">1</td>
                        <!-- string data type -->
                        <td data-type="s">12345678987654321</td>
                        <!-- formula data type -->
                        <td data-type="f">=CONCAT("TEXT A ","TEXT B")</td>
                    </tr>
                </table>

[PouriaSeyfi]

Please review this PR
@MarkBaker
@oleibman

[oleibman]

Resolved by PR #3445.