Add wasm-opt-for-rust-maintenance-4

[brson]

Milestone Delivery Checklist

• The milestone-delivery-template.md has been copied and updated.
• The invoice form 📝 has been filled out for this milestone.
• This pull request is being made by the same account as the accepted application.
• In case of acceptance, the payment will be transferred to the BTC/ETH payment address provided in the application.
• The delivery is according to the Guidelines for Milestone Deliverables.

Link to the application pull request: w3f/Grants-Program#1305

[keeganquigley]

Thanks for the delivery @brson someone will take a look as soon as possible.

[semuelle]

Thanks for the delivery, @brson. Happy to report that your milestone is accepted.

I have forwarded your invoice for processing.

[RouvenP]

hi @brson we transferred the payment today.

[brson]

hi @brson we transferred the payment today.

I see it. Thanks!