refactor version import

components/version/index.tsx

@@ -1,3 +1,3 @@
-import * as pkg from '../../package.json';
+import { version } from '../../package.json';
 
-export default (pkg as any).version;
+export default version;

typings/custom-typings.d.ts

@@ -86,5 +86,6 @@ declare var process: {
 
 declare module "*.json" {
   const value: any;
+  export const version: string;
   export default value;
 }