Bumping itertool version number, fixes downstream "Clippy" warning issue.

[martinfrances107]

Regarding a clippy warning seen in a app the uses leptos

The root cause is the family of leptos modules requiring BOTH versions 0.10.5 and 0.11.0 This PR will fix that. ( Also needs a bump to 0.12.0 )

warning: multiple versions for dependency `itertools`: 0.10.5, 0.11.0
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#multiple_crate_versions
note: the lint level is defined here
 --> src/lib.rs:4:9
  |
4 | #![warn(clippy::cargo)]
  |         ^^^^^^^^^^^^^
  = note: `#[warn(clippy::multiple_crate_versions)]` implied by `#[warn(clippy::cargo)]`

[gbj]

Thanks very much, as always!