implement the fetchPosts function in the postActions file

Author: vishalnagda1

src/actions/postActions.js

@@ -0,0 +1,14 @@
+import { FETCH_POSTS, NEW_POST } from "./types";
+
+export function fetchPosts() {
+  return function (dispatch) {
+    fetch("https://jsonplaceholder.typicode.com/posts")
+      .then((res) => res.json())
+      .then((posts) =>
+        dispatch({
+          type: FETCH_POSTS,
+          payload: posts,
+        })
+      );
+  };
+}