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>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "fs-extra": "^9.0.1",
     "html-to-text": "^6.0.0",
     "jsdom": "^16.4.0",
-    "node-fetch": "^2.6.1",
+    "node-fetch": "^2.6.7",
     "typescript": "^3.9.7",
     "yaml": "^1.10.0"
   }