update itertools: 13.0.0 -> 14.0.0

Summary:
[Changes](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md) to be aware of, with [971](rust-itertools/itertools#971) as my favourite:

 {F1974159737}

Differential Revision: D67751950

fbshipit-source-id: d5e39b7c685840b40aa7ba1b5015e8ccaea32b72

Cargo.toml

@@ -24,7 +24,7 @@ path = "print_cst.rs"
 [dependencies]
 bstr = { version = "1.10.0", features = ["serde", "std", "unicode"] }
 clap = { version = "3.2.25", features = ["derive", "env", "regex", "unicode", "wrap_help"] }
-itertools = "0.13.0"
+itertools = "0.14.0"
 num_enum = "0.5"
 ocamlrep = { path = "vendor/ocaml/interop/ocamlrep" }
 ocamlrep_ocamlpool = { path = "vendor/ocaml/interop/ocamlrep_ocamlpool" }