Bump serialize-javascript and terser-webpack-plugin in /wasm/demo (#7523)

Removes [serialize-javascript](https://github.com/yahoo/serialize-javascript). It's no longer used after updating ancestor dependency [terser-webpack-plugin](https://github.com/webpack/terser-webpack-plugin). These dependencies need to be updated together.


Removes `serialize-javascript`

Updates `terser-webpack-plugin` from 5.3.16 to 5.4.0
- [Release notes](https://github.com/webpack/terser-webpack-plugin/releases)
- [Changelog](https://github.com/webpack/terser-webpack-plugin/blob/main/CHANGELOG.md)
- [Commits](https://github.com/webpack/terser-webpack-plugin/compare/v5.3.16...v5.4.0)

---
updated-dependencies:
- dependency-name: serialize-javascript
  dependency-version: 
  dependency-type: indirect
- dependency-name: terser-webpack-plugin
  dependency-version: 5.4.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

wasm/demo/package-lock.json

@@ -4029,16 +4029,6 @@
                 "url": "https://github.com/sponsors/ljharb"
             }
         },
-        "node_modules/randombytes": {
-            "version": "2.1.0",
-            "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
-            "integrity": "sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==",
-            "dev": true,
-            "license": "MIT",
-            "dependencies": {
-                "safe-buffer": "^5.1.0"
-            }
-        },
         "node_modules/range-parser": {
             "version": "1.2.0",
             "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.0.tgz",
@@ -4384,16 +4374,6 @@
                 "node": ">= 0.6"
             }
         },
-        "node_modules/serialize-javascript": {
-            "version": "6.0.2",
-            "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-6.0.2.tgz",
-            "integrity": "sha512-Saa1xPByTTq2gdeFZYLLo+RFE35NHZkAbqZeWNd3BpzppeVisAqpDjcp8dyf6uIvEqJRd46jemmyA4iFIeVk8g==",
-            "dev": true,
-            "license": "BSD-3-Clause",
-            "dependencies": {
-                "randombytes": "^2.1.0"
-            }
-        },
         "node_modules/serve": {
             "version": "14.2.5",
             "resolved": "https://registry.npmjs.org/serve/-/serve-14.2.5.tgz",
@@ -5024,16 +5004,15 @@
             }
         },
         "node_modules/terser-webpack-plugin": {
-            "version": "5.3.16",
-            "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-5.3.16.tgz",
-            "integrity": "sha512-h9oBFCWrq78NyWWVcSwZarJkZ01c2AyGrzs1crmHZO3QUg9D61Wu4NPjBy69n7JqylFF5y+CsUZYmYEIZ3mR+Q==",
+            "version": "5.4.0",
+            "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-5.4.0.tgz",
+            "integrity": "sha512-Bn5vxm48flOIfkdl5CaD2+1CiUVbonWQ3KQPyP7/EuIl9Gbzq/gQFOzaMFUEgVjB1396tcK0SG8XcNJ/2kDH8g==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@jridgewell/trace-mapping": "^0.3.25",
                 "jest-worker": "^27.4.5",
                 "schema-utils": "^4.3.0",
-                "serialize-javascript": "^6.0.2",
                 "terser": "^5.31.1"
             },
             "engines": {