chore: reduce bundle size a bit

Author: hunterliu1003

packages/vue-final-modal/src/components/ModalsContainer.vue

@@ -5,7 +5,7 @@ import { useVfm } from '~/useApi'
 
 const { modalsContainers, dynamicModals } = useVfm()
 
-const uid = Symbol('ModalsContainer')
+const uid = Symbol(__DEV__ ? 'ModalsContainer' : '')
 const shouldMount = computed(() => uid === modalsContainers.value?.[0])
 
 modalsContainers.value.push(uid)

packages/vue-final-modal/src/useApi.ts

@@ -54,7 +54,7 @@ function withMarkRaw<T extends ComponentType>(options: Partial<UseModalOptions<T
  */
 export function useModal<T extends ComponentType = typeof VueFinalModal>(_options: UseModalOptions<T>): UseModalReturnType<T> {
   const options = reactive({
-    id: Symbol('useModal'),
+    id: Symbol(__DEV__ ? 'useModal' : ''),
     modelValue: !!_options?.defaultModelValue,
     resolveOpened: () => { },
     resolveClosed: () => { },