- update to 3.1.3:
  * #1401 Column name caches are slow and use a lot of memory
  * #1457 Improved handling of duplicate named styles
  * #1842 Rich-text can be saved if lxml is not installed
  * #1954 Documentation for sheet views is incorrect
  * #1973 Timedeltas not read properly in read-only mode
  * #1987 List of formulae names contains mistakes
  * #1967 Filters does not handle non-numerical filters
  * #2054 Type checking increases exponentially
  * #2057 Loading pivot tables can be unnecessarily slow
  * #2102 Improve performance when reading files with lots of
    custom properties
  * #2106 Setting Trendline.name attribute raises exception when
    saving
  * #2120 Timezone and Zombie formatting cannot be combined.
  * #2107 Column name generation is inefficient and slow
  * #2122 File handlers not always released in read-only mode
  * #2149 Workbook files not properly closed on Python ≥ 3.11.8
    and Windows
  * #2161 Pivot cache definitions using tupleCache had
    serialisation issues

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