Bump iota-client version to 1.1

[cycraig]

Description of change

Hot fix for a compilation error on the main branch reported in #524 due to the iota-client git dependency being updated.
Bumps the iota-client version to 1.1 from crates.io.

This is the same fix performed for the dev branch in #503. There should be no functional changes from applying this patch.

Edit: bumps identity to 0.4.1

Links to any relevant issues

Fixes issue #524

Type of change

• Bug fix (a non-breaking change which fixes an issue)
• Enhancement (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Fix

How the change has been tested

Tests and examples pass locally.

Change checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[cycraig]

Audit check fails due to serde_cbor (#518) which is only a dev-dependency, the chrono crate (#442) and the time crate (#440) which we are also not really vulnerable to given the particular steps for it to occur.

Edit: and every other check is failing due to the new Clippy lints introduced in Rust 1.57...