benmills/robotskirt — comment on commit 4632479644b869c2890443d34f7a8b21a9ea66c0
File:  line 0
By rmg:

That makes sense, since the 0.4.x and 0.6.x API's aren't compatible. #ifdef or pick only one to support? Or set the minimum engine version in package.json and block < 0.6.0?