Add MRU to keywords
Add MRU to keywords

Allow this module to be found under it's vernacular (though technically incorrect) name.

cyberthom/stale-lru-cache,shalotelli/node-lru-cache,isaacs/node-lru-cache,cyberthom/stale-lru-cache,isaacs/node-lru-cache,mikeszahaj/node-lru-cache,LaurentZuijdwijk/node-lru-cache