Enable wasm2js optimization (#192)

## 🎟️ Tracking

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## 📔 Objective

Just found out that we can also enable the `-Os` optimization used for
`wasm-opt` in the `wasm2js` binary, reducing the JS size from 15Mb to
7Mb.

## ⏰ Reminders before review

- Contributor guidelines followed
- All formatters and local linters executed and passed
- Written new unit and / or integration tests where applicable
- Protected functional changes with optionality (feature flags)
- Used internationalization (i18n) for all UI strings
- CI builds passed
- Communicated to DevOps any deployment requirements
- Updated any necessary documentation (Confluence, contributing docs) or
informed the documentation
  team

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Author: dani-garcia

crates/bitwarden-wasm-internal/build.sh

@@ -37,5 +37,5 @@ wasm-opt -Os ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.was
 wasm-opt -Os ./crates/bitwarden-wasm-internal/npm/node/bitwarden_wasm_internal_bg.wasm -o ./crates/bitwarden-wasm-internal/npm/node/bitwarden_wasm_internal_bg.wasm
 
 # Transpile to JS
-wasm2js ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm -o ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js
+wasm2js -Os ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm -o ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js
 npx terser ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js -o ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js