[improvement] adjust utils

packages/utils/use/i18n.ts

@@ -1,4 +1,5 @@
-import { get, camelize } from '..';
+import { get } from '..';
+import { camelize } from '../format/string';
 import locale from '../../locale';
 
 export function useI18N(name: string) {

packages/utils/use/sfc.ts

@@ -2,7 +2,7 @@
  * Create a basic component with common options
  */
 import '../../locale';
-import { camelize } from '..';
+import { camelize } from '../format/string';
 import { SlotsMixin } from '../../mixins/slots';
 import Vue, { VNode, VueConstructor, ComponentOptions, RenderContext } from 'vue';
 import { DefaultProps, FunctionComponent } from '../types';