cmake HAVE_DOUBLE_CONVERSION_ALLOW_CASE_INSENSIBILITY examples

ByConity/ByConity cmake/find/parquet.cmake :127 

check_cxx_source_compiles("
               #include <double-conversion/double-conversion.h>
               int main() { static const int flags_ = double_conversion::StringToDoubleConverter::ALLOW_CASE_INSENSIBILITY; return 0;}
        " HAVE_DOUBLE_CONVERSION_ALLOW_CASE_INSENSIBILITY)