Bump the minimum version of Review Board needed for the API cache.
Review Request #7018 — Created March 6, 2015 and submitted
We still had some major caching bugs in the API in Review Board 2.0.13. These are fixed in 2.0.14. This change bumps the API cache's minimum version accordingly.
Tested the cache against 2.0.13 and 2.0.14 (after temporarily bumping the
version to a non-alpha/dev build). Saw the API caching info only for 2.0.14.