v3.1.0

• Bump a hand-full of dependencies of the example app to address Dependabot notifications by @taylorreece in https://github.com/prismatic-io/embedded/pull/106
• Update LICENSE by @taylorreece in https://github.com/prismatic-io/embedded/pull/107
• Add Popover POPOVER_CLOSE post message events. by @jasoncomes in https://github.com/prismatic-io/embedded/pull/108

Full Changelog: https://github.com/prismatic-io/embedded/compare/v3.0.0...v3.1.0