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:development
...

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

package.json

@@ -57,7 +57,7 @@
     "coveralls": "^3.0.9",
     "mocha": "^7.2.0",
     "node-duration": "^1.0.4",
-    "node-fetch": "^2.6.1",
+    "node-fetch": "^2.6.7",
     "nyc": "^15.0.0",
     "source-map-support": "^0.5.16",
     "testcontainers": "^2.20.0",