chore: unify icon imoprts

Author: woothu

src/components/index.js

@@ -33,5 +33,5 @@ export * from './toast'
 export * from './toggler'
 export * from './widgets'
 
-import { CIcon } from '@coreui/icons-vue/index.js'
+import CIcon from '@coreui/icons-vue/CIcon.vue'
 export { CIcon }

src/components/table/CDataTable.vue

@@ -210,7 +210,7 @@
 <script>
 import CSpinner from '../spinner/CSpinner'
 import CPagination from '../pagination/CPagination'
-import { CIcon } from '@coreui/icons-vue/index.js'
+import CIcon from '@coreui/icons-vue/CIcon.vue'
 import { cilArrowTop, cilBan } from '@coreui/icons'
 
 export default {