felschatz

Closes #30 set the font to bold, if the weight of the font is equal to 700. According to https://xlrd.readthedocs.io/en/latest/api.html 700 is bold `Font weight (100-1000). Standard values are 400...

Bold cells are not always identified as bold

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* xls2xlsx version: 0.2.0 * Python version: 3.11 * Operating System: Windows ### Description For some reason my (from a third party generated) xls files bold cells are not correctly...