Convert between vcf versions
cat in.vcf | vcf-convert [OPTIONS] > out.vcf
About: Convert between VCF versions, currently to VCFv4.0 only.
-r, --refseq <file>
The reference sequence in samtools faindexed fasta file. (Not required with SNPs only.)
-v, --version <string>
4.0
-h, -?, --help
This help message.