Buffer.alloc is unavailable on Node 4 #120

Starting test suite

Running test 'arraybuffer'
Running test 'asyncworker'
Running test 'buffer'
Test failed: Internal Buffer
/home/nix/node/node-addon-api/test/testUtil.js:17
        throw e;
        ^

TypeError: Buffer.alloc is not a function
    at Array.<anonymous> (/home/nix/node/node-addon-api/test/buffer.js:17:28)
    at runGCTests (/home/nix/node/node-addon-api/test/testUtil.js:14:17)
    at Object.runGCTests (/home/nix/node/node-addon-api/test/testUtil.js:11:7)
    at test (/home/nix/node/node-addon-api/test/buffer.js:10:12)
    at Object.<anonymous> (/home/nix/node/node-addon-api/test/buffer.js:6:1)
    at Module._compile (module.js:434:26)
    at Object.Module._extensions..js (module.js:452:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)