adds disableCache option to disable this bootstrapping
adds request parallelisation
when a flag request is triggered while another flag request is already in progress, only one request is made and both hooks are resolved with that value
this is only done in case the requests match exactly (same endpoint, same user attributes)
this is useful in case somebody has multiple useFlags() calls spread in their code
localStoragedisableCacheoption to disable this bootstrappinguseFlags()calls spread in their code