v0.6.0

v0.6.0 improves API consistency, record ownership, and error handling across BAM, BCF/VCF, Tabix, and Faidx.

Notable changes

• Block-based open methods now return the block result.
• load_index raises MissingIndexError; use try_load_index for a boolean result.
• VCF FILTER values consistently return arrays, distinguishing passing, missing, and filtered records.
• Undefined BCF INFO fields now raise InfoDefinitionError.
• Bam#to_a and Bcf#to_a return independently owned records.
• Read, write, close, index, and native update failures are now reported reliably.
• Fixed BAM QNAME lengths, alignment bins, BCF missing values, and native resource handling.
• Added compatibility for repeated VCF version updates with HTSlib 1.19.