You may call it a release candidate of 1.0.0

On the road to stable version 1.0.0

* Non-optional subscript now traps program with a fatal error on missing config key (this must not ever happen, though)
* Dropped `swift-log` dependency (as it was barely used only once in non-optional subscript to report missing value)
* Updated README.md with more comprehensive Vapor compatibility layer example

String key subscript with optional result

0.2.0

String key subscript with optional result

Initial version

0.1.0

Readme update: Vapor compatibility