Variable *Sam-File-Format-Version*
The SAM file format version string supported by this library.
This is entered by default in a @HD line in the header section of a SAM file, unless user code explicitly asks for a different version number.
See http://samtools.github.io/hts-specs/SAMv1.pdf - Section 1.3.
Default is 1.5.
Value: "1.5"