fix(types): export paginateGraphQLInterface (#200)

This resolves issues in consumers of this package getting errors from TypeScript

```
The inferred type of 'Octokit' cannot be named without a reference to '@octokit/core/node_modules/@octokit/graphql/types'. This is likely not portable. A type annotation is necessary.
```

src/index.ts

@@ -4,7 +4,9 @@ import { createPaginate } from "./paginate.js";
 export type { PageInfoForward, PageInfoBackward } from "./page-info.js";
 export { VERSION } from "./version.js";
 
-type paginateGraphQLInterface = {
+// Export the paginateGraphQLInterface type in order to fix TypeScript errors in downstream projects
+// The inferred type of 'Octokit' cannot be named without a reference to '@octokit/core/node_modules/@octokit/graphql/types'. This is likely not portable. A type annotation is necessary.
+export type paginateGraphQLInterface = {
   graphql: Octokit["graphql"] & {
     paginate: ReturnType<typeof createPaginate> & {
       iterator: ReturnType<typeof createIterator>;