fix: use type imports for @octokit/core (#174)

`@octokit/core` is not a direct runtime dependency of this module, it is only used in tests and for the types

src/index.ts

@@ -1,4 +1,4 @@
-import { Octokit } from "@octokit/core";
+import type { Octokit } from "@octokit/core";
 import { createIterator } from "./iterator";
 import { createPaginate } from "./paginate";
 export type { PageInfoForward, PageInfoBackward } from "./page-info";

src/iterator.ts

@@ -1,5 +1,5 @@
 import { extractPageInfos } from "./extract-page-info";
-import { Octokit } from "@octokit/core";
+import type { Octokit } from "@octokit/core";
 import { getCursorFrom, hasAnotherPage } from "./page-info";
 import { MissingCursorChange } from "./errors";
 

src/paginate.ts

@@ -1,4 +1,4 @@
-import { Octokit } from "@octokit/core";
+import type { Octokit } from "@octokit/core";
 import { mergeResponses } from "./merge-responses";
 import { createIterator } from "./iterator";