Implement HTTP(S) URI Resolver

[dOrgJelli]

If wrappers are being hosted on a central server, addressable using a DNS based domain through HTTP(S), we should support querying them through a new URI resolver + authority.

For example, users could query a wrapper like so:

client.invoke({
  uri: "https/wrappers.domain.com/some-wrapper",
  ...
})

[dOrgJelli]

For reference, see this mini-hack where wrappers are being hosted at an HTTP endpoint: https://github.com/polywrap/mini-hacks/issues/23