shuchkin simplexlsx

• CVE-2024-56364 Medium 5.4 Cross-site Scripting vulnerability in SimpleXLSXEx::readThemeColors, SimpleXLSXEx::getColorValue and SimpleXLSX::toHTMLEx 0.3%
• CVE-2024-55878 Medium 6.8 Cross-site Scripting vulnerability in SimpleXLSXEx::readXfs and SimpeXLSX::toHTMLEx 0.5%