No init-key dispatch value for duct.module/reitit

[kkharji]

While setting up #9, and reading config file, I got an exception indicating that duct.module/reitit key isn't registered with init-key. It seems that both the key and namespace should match in order for integrant to work it's magic.

Currently, I managed to workaround this by to explicitly requiring duct.reitit namespace.

There are two possible solutions to fix this. Either change the module key to duct.reitit which breaks duct convention, or move reitit.clj "back" to duct/module.