v2.2.0

• Parallelized compare function with multiprocessing (#709)
• add compute signatures for 10x bam file (#713)
• Experimental v5 SBT format (#694)
• initial refactor of compute command (and associated test module) (#734)
• Fix --output-unassigned to output abundances if available. (#726)
• Update docstring for --traverse-directory on sourmash index (#727)