bump next to 12.1.0

lib/helpers/fetcher.ts

@@ -0,0 +1,7 @@
+// very simple fetch wrapper that's passed into SWR hooks:
+// https://swr.vercel.app/docs/data-fetching#fetch
+// note: fetch does *not* need to be poly/ponyfilled in Next.js:
+// https://nextjs.org/blog/next-9-1-7#new-built-in-polyfills-fetch-url-and-objectassign
+
+// eslint-disable-next-line no-undef
+export const fetcher = (url: RequestInfo) => fetch(url).then((res) => res.json());