Bump node-fetch from 2.6.1 to 2.6.7

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.1 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.1...v2.6.7)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -23,7 +23,7 @@
     "express": "^4.17.1",
     "luxon": "^1.26.0",
     "mongoose": "^5.11.19",
-    "node-fetch": "^2.6.1",
+    "node-fetch": "^2.6.7",
     "sharp": "^0.27.2"
   },
   "devDependencies": {