Bump generic-array from 0.14.7 to 1.2.0

Bumps [generic-array](https://github.com/fizyk20/generic-array) from 0.14.7 to 1.2.0.
- [Release notes](https://github.com/fizyk20/generic-array/releases)
- [Changelog](https://github.com/fizyk20/generic-array/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fizyk20/generic-array/commits)

---
updated-dependencies:
- dependency-name: generic-array
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -17,7 +17,7 @@ parity-scale-codec-derive = { path = "derive", version = "3.6.8", default-featur
 bitvec = { version = "1", default-features = false, features = ["alloc"], optional = true }
 bytes = { version = "1", default-features = false, optional = true }
 byte-slice-cast = { version = "1.2.2", default-features = false }
-generic-array = { version = "0.14.7", optional = true }
+generic-array = { version = "1.2.0", optional = true }
 arbitrary = { version = "1.4.1", features = ["derive"], optional = true }
 impl-trait-for-tuples = "0.2.3"