refactor(starter): upgrade to new version of gatsby

internal/gatsby/queries/posts-query.ts

@@ -0,0 +1,29 @@
+import { CreatePagesArgs } from "gatsby";
+
+import * as types from "../types";
+
+export interface PostsQueryResult {
+  allMarkdownRemark: {
+    edges?: Array<types.Edge>;
+  };
+}
+
+const postsQuery = async (graphql: CreatePagesArgs["graphql"]) => {
+  const result = await graphql<PostsQueryResult>(`
+    {
+      allMarkdownRemark(filter: { frontmatter: { draft: { ne: true } } }) {
+        edges {
+          node {
+            fields {
+              slug
+            }
+          }
+        }
+      }
+    }
+  `);
+
+  return result?.data?.allMarkdownRemark;
+};
+
+export default postsQuery;