updater@2.0.0-rc.4

221f50f5 (#1816 by @amrbashir) Encode + when making updater requests which can be cause incorrectly interpolating the endpoint when using {{current_version}} in the endpoint where the current version contains a build number, for example 1.8.0+1.
04a0aea0 (#1814 by @amrbashir) Breaking change, Changed UpdaterBuilder::endpoints method to return a Result.
04a0aea0 (#1814 by @amrbashir) Add dangerousInsecureTransportProtocol config option to allow using insecure transport protocols, like http