Bump @bytecodealliance/jco in /src/wasm_sandbox/guests/javascript

Bumps [@bytecodealliance/jco](https://github.com/bytecodealliance/jco) from 1.19.0 to 1.20.0.
- [Release notes](https://github.com/bytecodealliance/jco/releases)
- [Commits](bytecodealliance/jco@jco-v1.19.0...jco-v1.20.0)

---
updated-dependencies:
- dependency-name: "@bytecodealliance/jco"
  dependency-version: 1.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/wasm_sandbox/guests/javascript/package-lock.json

@@ -8,6 +8,6 @@
   },
   "devDependencies": {
     "@bytecodealliance/componentize-js": "^0.21.0",
-    "@bytecodealliance/jco": "^1.19.0"
+    "@bytecodealliance/jco": "^1.20.0"
   }
 }