Co-authored-by: Nzhualong <274131322@qq.com>

- Update unit test workflow dependencies package version

This closes #1777, fix the GetStyle or GetConditionalStyle function to returns incorrect DecimalPlaces field value

- Update documentation for the NewStyle function
- Update unit tests
- Update dependencies Go module
- Update GitHub workflow dependencies package version
- Update copyright agreement statement

- This made the GetPictureCell function support get embedded cell images
- Update dependencies module
- Update GitHub workflow
- Update documentation for the AddChart function

- Correction cell type when formatting date type cell value
- Add check for MID and MIDB formula functions num_chars arguments, prevent panic on specifying a negative number
- Ref #65, add support for 2 formula functions: SEARCH and SEARCHB
- Fix a v2.8.0 regression bug, error on set print area and print titles with built-in special defined name
- Add new exported function `GetPivotTables` for get pivot tables
- Add a new `Name` field in the `PivotTableOptions` to support specify pivot table name
- Using relative cell reference in the pivot table docs and unit tests
- Support adding slicer content type part internally
- Add new exported source relationship and namespace `NameSpaceSpreadSheetXR10`, `ContentTypeSlicer`, `ContentTypeSlicerCache`, and `SourceRelationshipSlicer`
- Add new exported extended URI `ExtURIPivotCacheDefinition`
- Fix formula argument wildcard match issues
- Update GitHub Actions configuration, test on Go 1.21.x with 1.21.1 and later
- Avoid corrupted workbooks generated by improving compatibility with internally indexed color styles

- Increase max cell styles to 65430
- Add new exported error variable `ErrCellStyles`
- Update unit tests, support test under Go 1.20.x

- Improving performance for stream writer `SetRow` function,  reduces memory usage over and speedup about 19%
- Update dependencies module
- Update GitHub workflow

- Add supported options in the docs of the functions `SetSheetPrOptions` and `GetSheetPrOptions`
- Add go1.19 unit test settings, and made the test case compatible with go1.19
- Update dependencies module

Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- Update GitHub Action settings

- new formula function: YEARFRAC, ref #65
- update the codecov version
- remove unused variable

- fix ineffectual variable assignments
- timeout in go test

- Make unit test on Go 1.7
- API documentation updated