README Doesn't Say to Use Node 8

[dvisztempacct]

I cloned and checked out tag v2.0.0-alpha.24 and ran yarn && yarn build on Node v10.9.0 and had a build error v8::Object’ has no member named ‘ForceSet.

It builds under Node v8.11.4 so I'm assuming the officially supported version of Node is 8.

That should be mentioned in the README.

I'm running Ubuntu bionic.

[Stephen-McDaniel]

Similar experience on Debian Stretch. Node 11 failed build and 8 worked. Alpha 24.

[fj-sanchez]

Same issue. I installed nvm and then node 8.16.1 and it can build.