verified compatibility with the node v0.10.23 release. bumped version.

This pull resolves an npm warning because of the supported engines in the package.json.

npm WARN engine iptrie@0.0.3: wanted: {"node":"0.2 || 0.4 || 0.5 || 0.6 || 0.8"} (current: {"node":"v0.10.23","npm":"1.3.17"})

I've tested it on v0.10.22, v0.10.23 and everything works as expected.