API Warnings unknown extensions and types

[hoani]

When running the api-template against the latest plug-api-types, we get the following warnings:

hoani@Hoani-MBP api-template % node index.js
Connecting to ws://localhost:9944
2020-06-22 14:42:40        API/INIT: RPC methods not decorated: genericAsset_registeredAssets, state_queryStorageAt}
Unable to resolve type AssetInfo, it will fail on constrution
Unknown signed extensions [OptionSignedExtension] found, treating them as no-efect
Unknown signed extensions [OptionSignedExtension] found, treating them as no-efect
Unknown types found, no types for AssetInfo,schnorrkel::Randomness,schnorrkel::RawVRFOutput
Unknown signed extensions [OptionSignedExtension] found, treating them as no-efect
Unknown signed extensions [OptionSignedExtension] found, treating them as no-efect
You are connected to chain Development using Plug Node v2.0.0-alpha.5

First mentioned in PR #15

These warnings should be addressed.