How to disable/enable case sensitive for v-select

İs that possible to set some rules for disable or enable case sensitive searchable v-select

<v-select label="name" taggable v-model="selectedAgency"
          :options="agencyList" 
          :on-change="onAgencyChange" 
          placeholder="Agency"/>"></v-select>

Official page: https://sagalbot.github.io/vue-select/