fix(CFormInput): ReferenceError: File is not defined

Author: mrholek

packages/coreui-vue/src/components/form/CFormInput.ts

@@ -1,6 +1,8 @@
 import { defineComponent, h } from 'vue'
 import { CFormControlWrapper } from './CFormControlWrapper'
 
+export const File = typeof window !== 'undefined' ? window.File : class File extends Object {}
+
 const CFormInput = defineComponent({
   name: 'CFormInput',
   props: {