Imports of package tvsaver

PathSynopsis
github.com/spdx/tools-golang/spdxPackage spdx contains references to the latest spdx version
github.com/spdx/tools-golang/tvsaver/saver2v1
github.com/spdx/tools-golang/tvsaver/saver2v2
ioPackage io provides basic interfaces to I/O primitives.