chore(deps-rs): bump priority-queue from 2.0.2 to 2.0.3 (#364)

Bumps [priority-queue](https://github.com/garro95/priority-queue) from
2.0.2 to 2.0.3.
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Cargo.toml

@@ -43,7 +43,7 @@ num-rational = "0.4"
 num_cpus = "1.16.0"
 peak_alloc = "0.2.0"
 petgraph = { version = "0.6.3", default-features = false }
-priority-queue = "2.0.2"
+priority-queue = "2.0.3"
 rayon = "1.5"
 rmp-serde = "1.1.2"
 rstest = "0.19.0"