v0.5.0 Secure Connections

This is a release in the Singleton series which allows you to deploy one application at a time.

The big change in this release is that we now have secure connections using libp2p!

What's Changed

• rpc: Add libp2p as a connection option by @richiejp in #14
• Update README and set default host on login by @richiejp in #16

Full Changelog: v0.4.0...v0.5.0