Address the Buffer() deprecation warning

The IISNode logs regularly report deprecation warnings for Buffer(). Here is the warning:
```(node:2496) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.```

There is currently no use of the [Buffer](https://www.npmjs.com/package/buffer) npm package in GEAR3's code and no reference to ```require('buffer')```. Buffer is a dependency of one of the packages: [bl (aka BufferList)](https://www.npmjs.com/package/bl).