update version and doc cn

Add supprt for if/elseif/else statements inside cell (mini-software#487)

* add support for grouped cells

* fix for rows after endgroup

* minor fix for text after grouping

* fix unit tests

* fix unit tests and docs

* minor fix

* Add support to vertical merge cells

* minor fixes in merge cells

* minor fix

* fix complex scenario

* finalize changes

* Add support for if/elseif/else statements

doc : add chinese readme desc

doc : update release

update doc

[New] SaveAs support FastMode

[New] Support CSV Insert #I4X92G (via @shps951023)

[New] Support DateTimeOffset and ExcelFormat mini-software#430 (via @…

…Lightczx , @shps951023 )