WIP: skipmer improvements #6084

Job	Run time
Check	25s
coverage	10m 16s
test_all_features	13m 39s
test (beta)	1m 31s
test (stable)	1m 33s
test (windows)	3m 36s
test (macos)	1m 19s
Check if cbindgen runs cleanly for generating the C headers	9m 4s
Lints (beta)	34s
minimum_rust_version	7m 23s
Lints (stable)	29s
Publish (on tags, dry-run otherwise)	6m 45s
Run tests under wasm32-wasi	1m 15s
Check if wasm-pack builds a valid package for the sourmash crate	1m 33s
	59m 22s

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