Add wasm-opt-for-rust-maintenance-8.md

maintenance_deliveries/wasm-opt-for-rust-maintenance-8.md

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+# Maintenance Delivery :mailbox:
+
+**The [invoice form :pencil:](https://docs.google.com/forms/d/e/1FAIpQLSfmNYaoCgrxyhzgoKQ0ynQvnNRoTmgApz9NrMp-hd8mhIiO0A/viewform) has been filled out correctly for this delivery**  
+
+* **Application Document:** https://github.com/w3f/Grants-Program/blob/master/applications/maintenance/wasm-opt-for-rust.md
+* **Delivery Number:** 8
+* **Delivery Date:** 2023/08/03
+
+
+**Context**
+
+We upgraded to binaryen 114 and submitted patches to substrate and cargo-contract.
+We re-engaged with upstream developers about fixing Unicode handling on Windows.
+
+**Deliverables**
+
+Note: a full hourly accounting of work performed is included with the invoice.
+
+| Number | Deliverable | Link | Notes |
+| ------------- | ------------- | ------------- |------------- |
+| 1. | Binaryen 114 upgrade | https://github.com/brson/wasm-opt-rs/pull/149 | |
+| 2. | Upgrade cargo-contract to wasm-opt 0.114.0 | https://github.com/paritytech/cargo-contract/pull/1252 | |
+| 3. | Upgrade substrate to wasm-opt 0.114.0 | https://github.com/paritytech/substrate/pull/14695 | |
+| 4. | Fix bug in binaryen windows patch | https://github.com/WebAssembly/binaryen/pull/5671#issuecomment-1652558434 | |
+| 5. | Responded to report on build times | https://github.com/brson/wasm-opt-rs/issues/148 | |
+
+**Additional Information**
+
+N/A