GitLab

make set cell value is concurrency safe

- typo fix
- reset cell with and height when insert picture into merged cell with autofit

avoid duplicate filter database in workbook defined name

- typo fix, resolve #635

- styles: allow empty and default cell formats, #628

- resolve ineffectual assignment
- handle exception with invalid formula
- update range resolver

#65 fn: CSCH, DECIMAL, DEGREES, EVEN, EXP, FACT, FACTDOUBLE, FLOOR, FLOOR.MATH, FLOOR.PRECISE, INT, ISO.CEILING, LN, LOG, LOG10, MDETERM

-  added 3 internal function: getSheetID, getActiveSheetID, getSheetNameByID

- Allow empty filter, data, and rows in the pivot table
- Add more test case for pivot table

<sheetData><row r="1"><c r="A1" s="1" t="s"><v>0</v></c><c r="B1" s="1" t="s"></c></row></sheetData>