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

- Update example code in the documentation
- Update unit tests
- Rename `PictureOptions` to `GraphicOptions`
- Adjust partial options fields data types for the `PictureOptions` and `Shape` structure
- Update dependencies module

Rename exported constants `NameSpaceDublinCoreMetadataIntiative` to `NameSpaceDublinCoreMetadataInitiative`

- go test updated;
- fix typo and `gofmt -s` formatted

1) Update readme file credits and go report badge added; 2) Remove use less function; 3) Update test file.