[BUG] - Install on macOS - sub-dependency nan "ForceSet"
When installing on macOS Mojave I get errors for a couple of the sub-dependencies: 

../../nan/nan_maybe_43_inl.h:88:15: error: no member named 'ForceSet' in 'v8::Object'

It appears that this is related to using Node 11, and these sub-dependencies requiring too old a version of nan. 