WIP: skipmer improvements #6027

Job	Run time
Check	27s
Check if cbindgen runs cleanly for generating the C headers	8m 36s
coverage	10m 13s
Lints (beta)	42s
Lints (stable)	36s
minimum_rust_version	6m 49s
Publish (on tags, dry-run otherwise)	8m 48s
test (beta)	1m 33s
test (stable)	1m 31s
test (windows)	3m 41s
test_all_features	4m 32s
Run tests under wasm32-wasi	1m 20s
test (macos)	1m 46s
Check if wasm-pack builds a valid package for the sourmash crate	1m 33s
	52m 7s

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