Bump web-sys from 0.3.69 to 0.3.70 #5575

Job	Run time
Check if cbindgen runs cleanly for generating the C headers	8m 18s
Check	29s
coverage	9m 54s
Lints (beta)	40s
minimum_rust_version	8m 19s
Lints (stable)	28s
Publish (dry-run)	8m 6s
test (beta)	1m 42s
test_all_features	13m 37s
test (stable)	1m 26s
Run tests under wasm32-wasi	1m 17s
Check if wasm-pack builds a valid package for the sourmash crate	1m 19s
test (windows)	3m 42s
test (macos)	1m 16s
	1h 0m 33s

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