v0.4.0 (Thu Sep 21 2017)
This is a complete rewrite of rules_node. In prior releases npm
was used to install dependencies, this has been replaced with yarn.
The mechanism for associating external (npm) node modules was
previously based on assembling a NODE_PATH enviroment variable.
This has been replaced by code that constructs a fresh node_modules/
tree foreach node_binary rule, having much better hermeticity
characteristics.