Bump thiserror from 1.0.49 to 1.0.50 #3927

Job	Run time
Check	35s
Check if cbindgen runs cleanly for generating the C headers	1m 41s
coverage	4m 26s
Lints (beta)	41s
minimum_rust_version	6m 16s
Lints (stable)	49s
Publish (dry-run)	1m 0s
test (beta)	2m 49s
test_all_features	15m 25s
test (stable)	2m 24s
Run tests under wasm32-wasi	2m 38s
test (windows)	4m 58s
Check if wasm-pack builds a valid package for the sourmash crate	2m 30s
test (macos)	3m 23s
	49m 35s

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