Duplexify fork causing breakage on node stable

[hackergrrl]

I was trying to figure out why js-ipfs CI has been failing lately and it seems to be coming from interface-connection as of 0.1.6.

I think it's the duplexify fork: de465f4

I didn't dig any deeper as to why this is breaking on node stable (6.3.0) but not earlier (even 6.2.2 works fine for me), but hopefully this is enough to be helpful to you.

[dignifiedquire]

See mafintosh/duplexify#6 for details, there is already a fixed branch not all repos have been updated though.