v0.6.0

• Add in-SQL dna_revcomp(?) to reverse-complement a DNA sequence TEXT value
• The SQLite developers' UINT collating sequence is now bundled and enabled automatically
  • useful for sorting by chromosome names (e.g. 'chr2' < 'chr10') and other identifiers
  • simply ORDER BY chrom COLLATE UINT
• Use speedier Zstandard v1.4.7 internally
• Portability tweaks to prebuilt shared library