Update dev-dependencies

pretty_assertions: 1.3 -> 1.4

criterion 0.5 requires Rust 1.70 (because of clap 0.4),
but our MSRV currently is 1.56.
Because it is used only for sporadic checks of performance,
it is not worth to raise MSRV just for it, so later

Cargo.toml

@@ -24,7 +24,7 @@ arbitrary = { version = "1", features = ["derive"], optional = true }
 
 [dev-dependencies]
 criterion = "0.4"
-pretty_assertions = "1.3"
+pretty_assertions = "1.4"
 regex = "1"
 # #[serde(other)] allowed not only inside field_identifier since 1.0.79
 # serde does not follow semver in numbering and their dependencies, so we specifying patch here