Update itertools requirement from 0.10 to 0.11 (use-ink#1824)

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...v0.11.0)

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

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

crates/ink/codegen/Cargo.toml

@@ -24,7 +24,7 @@ quote = "1"
 syn = { version = "2.0", features = ["parsing", "full", "extra-traits"] }
 proc-macro2 = "1.0"
 derive_more = { version = "0.99", default-features = false, features = ["from"] }
-itertools = "0.10"
+itertools = "0.11"
 either = { version = "1.5", default-features = false }
 blake2 = "0.10"
 heck = "0.4.0"

crates/ink/ir/Cargo.toml

@@ -21,7 +21,7 @@ name = "ink_ir"
 quote = "1"
 syn = { version = "2.0", features = ["parsing", "full", "visit", "extra-traits"] }
 proc-macro2 = "1.0"
-itertools = { version = "0.10", default-features = false }
+itertools = { version = "0.11", default-features = false }
 either = { version = "1.5", default-features = false }
 blake2 = "0.10"
 ink_prelude = { version = "4.1.0", path = "../../prelude/", default-features = false }

crates/storage/Cargo.toml

@@ -30,7 +30,7 @@ array-init = { version = "2.0", default-features = false }
 [dev-dependencies]
 quickcheck = "1.0"
 quickcheck_macros = "1.0"
-itertools = "0.10"
+itertools = "0.11"
 
 ink = { path = "../ink" }