MRG: update sourmash core to r0.15.2 #5743

Job	Run time
Lints (beta)	36s
Lints (stable)	36s
Check	27s
test (beta)	1m 32s
test_all_features	13m 13s
test (stable)	1m 35s
Check if wasm-pack builds a valid package for the sourmash crate	1m 22s
test (windows)	4m 13s
Check if cbindgen runs cleanly for generating the C headers	8m 6s
test (macos)	1m 21s
coverage	10m 15s
minimum_rust_version	6m 16s
Publish (dry-run)	7m 44s
Run tests under wasm32-wasi	1m 25s
	58m 41s

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