This splits the Ethereum contract into a generic Wormhole and a
purpose-specific token transfer module that uses the main contract
for verification.
This acts as a draft for this structure.
Change-Id: I59e133dd7558d5e046045e464e4740241c696d5f
Ran `npm update`. This resolves a ganache crash.
We can't really use `npm ci` because it's intentionally incompatible
with our incremental development workflow. We'll want to use it for
production builds, though.
ghstack-source-id: c66c5d464796e61c6781b339d6d74ebba9704144
Pull Request resolved: https://github.com/certusone/wormhole/pull/89