Can't decode sharedStrings.xml

[MaxDesiatov]

Failing elements:

<si>
    <r>
      <rPr>
        <sz val="10"/>
        <color indexed="8"/>
        <rFont val="Helvetica Neue"/>
      </rPr>
      <t xml:space="preserve"> the </t>
    </r>

This is blocked by CoreOffice/XMLCoder#12, potential API design for resolving this is described in MaxDesiatov/XMLCoder#45