Use `Buffer.allocUnsafe()` instead of `new Buffer()` in tests.
Use `Buffer.allocUnsafe()` instead of `new Buffer()` in tests.

neon-bindings/neon,dherman/nanny,neon-bindings/neon,neon-bindings/neon,rustbridge/neon,dherman/nanny,rustbridge/neon,dherman/nanny,rustbridge/neon,rustbridge/neon,rustbridge/neon,dherman/nanny,rustbridge/neon,neon-bindings/neon