Migrating from 3.3.0 to 3.4.0

In CAUSEWAY-3896 we made a small change to the API for the WrapperFactor's async programming model.

For example:

var counter = bookmarkService.lookup(bookmark, Counter.class).orElseThrow();

var counter = wrapperFactory.asyncWrap(counter)                 (1)
          .applyAsync(Counter::bumpUsingDeclaredAction)
          .tryGet(5, TimeUnit.SECONDS)                          (2)
          .valueAsNonNullElseFail();

assertThat(counter.getNum()).isEqualTo(2L);

1	returns the detached counter entity
2	wait max 5 sec to allow executor to complete before continuing