Pass required prop to fieldtypes

Author: duncanmcclean

resources/js/components/Fieldtypes/CouponValueFieldtype.vue

@@ -2,13 +2,15 @@
     <div>
         <money-fieldtype
             v-if="mode === 'fixed'"
+            handle="value"
             :value="couponValue"
             :meta="meta.meta.money"
             :config="meta.config.money"
             @update:value="couponValueUpdated"
         />
         <integer-fieldtype
             v-else-if="mode === 'percentage'"
+            handle="value"
             :value="couponValue"
             :meta="meta.meta.integer"
             :config="meta.config.integer"