mock-fs does not work with node 0.11.15

[mlegenhausen]

Test file test.js:

const mock = require('mock-fs');
const fs = require('fs');

fs.createReadStream('test.js');

Throws:

Assertion failed: (object->InternalFieldCount() > 0), function Wrap, file ../src/util-inl.h, line 106.
[1]    6085 abort      node test.js

[mlegenhausen]

Should be version 0.11.15 and 0.11.16 supported too? If so, the version system should be able to support more than minor versions. Maybe the node-semver module can solve the problem for all future versions.