0.6.0: ✨ Allow passing vcf as 2nd arg to macros (#45) (#46)

• Now vcf (the instance of cyvcf2.VCF is allowed to be passed as 2nd argument to continuous and categorical macros (#45).

  from vcfstats.macros import cont
  
  @cont
  def GLOBAL_POS(variant, vcf):
    chrom = variant.CHROM.replace("chr", "")
    chridx = 23 if chrom == "X" else 24 if chrom == "Y" else int(chrom)
    prev_chrom_lens = sum(vcf.seqlens[:(chridx-1)]
    return prev_chrom_lens + variant.POS

  Check the API documentation of cyvcf2 to see what information we can get from vcf.