Within a given R session, it will be highly unlikely that API responses
to calls to Team Cymru services will change if the parameters have
not varied (i.e. you use the same vector of IP addresses again). To
respect the resources that have beeen freely provided, all the API
functions cache their results.
It may be advantageous or necessary to invalidate one or more of these
caches. This function allows for the invalidation of one or more (or all)
caches.