deps: Update to heim 0.1

[ClementTsang]

Description

A description of the change and what it does. If relevant, please provide screenshots of what results from the change:

Update to heim 0.1.

Issue

If applicable, what issue does this address?

Closes: #341

Type of change

Remove the irrelevant ones:

• Other (something else - please specify)

Test methodology

If relevant, please state how this was tested:

Furthermore, please tick which platforms this change was tested on:

• Windows
• macOS
• Linux

If relevant, all of these platforms should be tested.

Checklist

If relevant, ensure the following have been met:

• Change has been tested to work, and does not cause new breakage unless intended
• Code has been self-reviewed
• Documentation has been added/updated if needed (README, help menu, etc.)
• Passes CI pipeline (clippy check and cargo test check)
• Areas your change affects have been linted using rustfmt (cargo fmt)
• No merge conflicts arise from the change

Other information

Provide any other relevant information to this change:

[ClementTsang]

Blocked by heim-rs/heim#291, cannot compile on nightly right now. Will merge as soon as it's resolved.

[ClementTsang]

0.1.0-rc.1 has arrived. Merging upon CI completion.