fails to build on 10.13.2

[LauraKirby]

Node modules need to be updated to take into account a bug fix in node-gyp. Node modulelzf depends on it. When looking into lzf, the readme url (https://github.com/Sonetica/node-lzf#readme) listed within node_modules/lzf/package.json lead to a 404.

npm i rdb-tools

> int64-native@0.2.1 install /Users/laura/Desktop/redis-db-test/node_modules/int64-native
> node-gyp configure && node-gyp build

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

  CXX(target) Release/obj.target/Int64/src/main.o
In file included from ../src/main.cc:8:
../src/Int64.h:10:22: error: expected class name
class Int64 : public ObjectWrap {

[codeaholics]

Pull requests welcome! :-)