add 新增ele类型声明

.eslintrc-auto-import.json

@@ -1,6 +1,7 @@
 {
   "globals": {
     "ComponentInternalInstance": true,
+    "TransferKey": true,
     "ElFormRules": true,
     "CheckboxValueType": true,
     "PropType": true,

src/types/element.d.ts

@@ -26,6 +26,7 @@ declare global {
   declare type ElSliderInstance = InstanceType<typeof ep.ElSlider>;
   declare type ElUploadInstance = InstanceType<typeof ep.ElUpload>;
 
+  declare type TransferKey = ep.TransferKey;
   declare type CheckboxValueType = ep.CheckboxValueType;
   declare type ElFormRules = ep.FormRules;
   declare type DateModelType = ep.DateModelType;