Add v4.3 modified base models
- 5mC+5hmC CG-context SUP
- 5mC+5hmC CG-context HAC
- 5mC+5hmC all-context HAC and SUP
- 6mA all-context HAC and SUP
- 4mC+5mC all-context SUP (research model)
Bug fixes:
- Fix overflow on re-squiggle (#138)
- Fix issue with split reads in API (#134)
