Fix crashing on Electron > 21

[minggangw]

Since Electron 21, the V8 sandboxed pointers was enabled, which disables creating a new BackingStore and taking over an external memory block. Instead, we must copy the data into a newly-allocated memory that is inside V8 memory cage.

See more details: https://www.electronjs.org/blog/v8-memory-cage

This patch fixed the crashing when running on Electron > 21.

Testing

1. Electron v25.0.1 with Iron

   • Automated test: electron --expose-gc ./scripts/run_test.js
   • Manually tested: electron example/subscription-message-example.js & node example/publisher-message-example.js
   2. Nodejs v18.16.0 with Iron
   • Automated test: npm test

Fix #864