Update itertools requirement from >=0.10, <0.14 to >=0.10, <0.15 (#268)

Updates the requirements on [itertools](https://github.com/rust-itertools/itertools) to permit the latest version.
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](rust-itertools/itertools@v0.10.0...v0.14.0)

---
updated-dependencies:
- dependency-name: itertools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

plotly/Cargo.toml

@@ -47,7 +47,7 @@ wasm-bindgen-futures = { version = "0.4", optional = true }
 [dev-dependencies]
 csv = "1.1"
 image = "0.25"
-itertools = ">=0.10, <0.14"
+itertools = ">=0.10, <0.15"
 itertools-num = "0.1"
 ndarray = "0.16"
 plotly_kaleido = { version = "0.11", path = "../plotly_kaleido", features = [