0.09
        - Generate a warning if no config is specified, or config
          is specified using the old key.
        - Support the compute() method, and emulate it if the backend
          doesn't have it.

0.08
        - Forgot to add MRO::Compat to Makefile.PL, fail.

0.07
        - Switch from NEXT to MRO::Compat.
        - Change config key from 'cache' to 'Plugin::Cache', old key
          is still supported for backwards compatibility, but the new
          key is preferred (RT#40344).

0.06
        - clarify the documentation on how to configure a backend
        - due to stacked evals, certain start up errors were quietly
          ignored until the first cache hit. These start up errors
          now correctly manifest themselves at start up time.
0.05
        - change base class order to appease Class::C3

0.04
        - ???

0.03
        - Be more compatible with ->set() convention of passing expiry

0.02
        - Pass around a hash ref instead of a list of kvp.

0.01
        - Initial release