Pull latest abap2xlsx changes

Remove doma ZEXCEL_BOOLE01 (abap2xlsx#738)

AUnit warning zcl excel reader huge file "# au  > "#au abap2xlsx#739 (abap2xlsx#742)

Synchronize latest changes from master sapmentors/abap2xlsx

These lines are added to method SET_CELL of ZCL_EXCEL_WORKSHEET:
    IF lv_value CS '_x'.
      " Issue abap2xlsx#761 value "_x0041_" rendered as "A".
      " "_x...._", where "." is 0-9 a-f or A-F (case insensitive), is an internal value in sharedStrings.xml
      " that Excel uses to store special characters, it's interpreted like Unicode character U+....
      " for instance "_x0041_" is U+0041 which is "A".
      " To not interpret such text, the first underscore is replaced with "_x005f_".
      " The value "_x0041_" is to be stored internally "_x005f_x0041_" so that it's rendered like "_x0041_".
      " Note that REGEX is time consuming, it's why "CS" is used above to improve the performance.
      REPLACE ALL OCCURRENCES OF REGEX '_(x[0-9a-fA-F]{4}_)' IN lv_value WITH '_x005f_$1' RESPECTING CASE.
    ENDIF.