[bug] Special characters inside cell values are stripped

[mikkurogue]

Current behaviour:

All special characters inside si -> t values are stripped.

Say you have a value in an excel cell like A > B, this is represented in the sharedStrings as:

<si>
  <t>A &gt; B</t>
</si>

The current iteration of xcsv strips the special character already, but in the case of values this should not be the case.

Expected:

Value to be represented as a string with the special character rendered correctly and not omitted as whitespace.

[mikkurogue]

For now we have a fix issued by reverting to an older package version. however this is only temporary

Tracking: tafia/quick-xml#900