Bump node-fetch from 2.6.0 to 2.6.1

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/bitinn/node-fetch/releases)
- [Changelog](https://github.com/node-fetch/node-fetch/blob/master/docs/CHANGELOG.md)
- [Commits](node-fetch/node-fetch@v2.6.0...v2.6.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -10,7 +10,7 @@
   "dependencies": {
     "gray-matter": "^4.0.2",
     "next": "9.3.5",
-    "node-fetch": "^2.6.0",
+    "node-fetch": "^2.6.1",
     "react": "16.13.1",
     "react-dom": "16.13.1",
     "swr": "^0.2.0"