Specify swift-syntax version in manifest

[infinitepower18]

Specified a swift-syntax version in the Package.swift manifest to resolve an error when trying to add csv2img to a project.

[fummicc1]

Thank you!
it seems that error happens in CsvBuilder because of this version updtae.
Could you also fix the error? If it's difficult, I can undertake it.🙆‍♂️

[infinitepower18]

Hi, I'm not sure why that is. I haven't come across this when using the package.

The problem was, without a version defined, the package cannot be added to an Xcode project and will display this error:

[fummicc1]

I see. I think you don't use CsvBuilder library, but just use Csv2Img library. so let me add a new commit to address above issue 🙏

[fummicc1]

The problem was, without a version defined, the package cannot be added to an Xcode project and will display this error:

I agree! Thank you for your PR :)

I will merge this update as CI passes.