Fixed safeWindow import

Author: iuliacimpeanu

custom.d.ts

@@ -0,0 +1,3 @@
+declare module '@multiversx/sdk-dapp/out/constants/window.constants.mjs' {
+    export const safeWindow: typeof window;
+  }

src/lib/sdkCore.ts

@@ -18,4 +18,4 @@ export {
   UserSigner
 } from '@multiversx/sdk-core';
 
-export { safeWindow } from '@multiversx/sdk-dapp/out/constants';
+export { safeWindow } from '@multiversx/sdk-dapp/out/constants/window.constants.mjs';