Increase resource ID limit while stamping

[vsenko]

During stamping operations there is an artificial limit on the highest resource id:

• https://github.com/pdfcpu/pdfcpu/blob/master/pkg/pdfcpu/stamp.go#L1122
• https://github.com/pdfcpu/pdfcpu/blob/master/pkg/pdfcpu/stamp.go#L1136

Is it possible to increase it (up to 100000 for example)?

[hhrutter]

This fixed with https://github.com/pdfcpu/pdfcpu/releases/tag/v0.7.0

[vsenko]

Cool, thank you!

And thank you for the new release!