When an application updates metrics for a toggle we now
stores the timestamp on the toggle when it was last seen
used by an application. This will make it much easier to
detect toggles not in use anymore.
closes#642
* feat: move secrets to settings
* feat: Add better support for detailed db options.
Added db field in options to allow better control of
db-options. Especially important to allow special chars
in database password which might lead to an invaid url
when defined as a database-url.
* fix: integrate logger with knex logger
* fix: remove secret option from all examples
* fix: more options.js unit tests
* fix: added settings-store e2e tests
Instead of instructing users to do static calls
in to Unleash, she should instead be allwed to
specify the log provider as an option to Unleash.
This commit introduces the "getLogger" option,
a function responsible for creating a logger.
