#70 add support for onChange method in itemDetails component

Author: szczepanmasny

src/utils/crud/components/ItemDetails.vue

@@ -171,7 +171,11 @@ export default {
       return refField ? refField.value : undefined
     },
     valueChanged (val, fieldColumn) {
-      this.$set(this.fields[this.fields.findIndex(el => el.column === fieldColumn)], 'value', val)
+      const field = this.fields[this.fields.findIndex(el => el.column === fieldColumn)]
+      this.$set(field, 'value', val)
+      if (field.onChange) {
+        field.onChange(val, this.fields)
+      }
     },
     close () {
       this.details.show = false