- Deduplicate LinkedKeyBinding by key before falling back to the target key
- Rather than just dropping the Guice keys during deduplication, retains the original Guice key if possible. Otherwise bindings may fail to resolve, as is the case with map bindings
- Avoid duplicating beans for untargetted bindings
- Avoid duplicating multibindings
It is better to be explicit about beans of type `Module` and make
sure they don't interfere with Spring trying to enhance
`@Configuration` classes. The tests are now clear of the pesky
warning logs, and there is a new section in the README.
