Update pako dependency

[puzrin]

Would be nice to release if possible, to use the same pako version across different projects.

[dduponchel]

I think we should use a ~1.0.0 instead of ^1.0.0. Our website advertises that JSZip is tested with nodejs 0.8 (well...) but the support of ^ was added in node 0.10.26. The travis build can't work on node 0.8 because of dependencies of devDependencies using a ^ (and a ^ our devDependencies) but npm install jszip should work.

The ^ version range is now nearly everywhere and if we can't test in node 0.8 maybe we should drop its support. Which means breaking things for those using node 0.8, so a major version bump in my opinion.

[puzrin]

Yep, sir :)

changed ^ to ~

[puzrin]

About node versions. I'd recomment to drop nodes < 4.0 in next major release (3.0.0). In 2.+ it worth to keep everything unchanged.

[dduponchel]

Thanks :)

[puzrin]

Could you publish?

[dduponchel]

I'll see with @Stuk for a release.