depends on leveldown that fails to build

[xloem]

When I attempt to install level-dump, it tries to install leveldown 1.7.2, which fails to build for me:

  CXX(target) Release/obj.target/leveldown/src/batch.o
In file included from ../../../../nan/nan.h:192:0,
                 from ../src/batch.cc:3:
../../../../nan/nan_maybe_43_inl.h: In function ‘Nan::Maybe<bool> Nan::ForceSet(v8::Local<v8::Object>, v8::Local<v8::Value>, v8::Local<v8::Value>, v8::PropertyAttribute)’:
../../../../nan/nan_maybe_43_inl.h:112:15: error: ‘class v8::Object’ has no member named ‘ForceSet’
   return obj->ForceSet(isolate->GetCurrentContext(), key, value, attribs);

leveldown@5.0.1 installs fine, however.

[xloem]

(EDIT: i tried incrementally updating things, but the app won't process my db afterwards despite building, so maybe i did something wrong)