Bump node-fetch from 2.6.0 to 2.6.7

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.0 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.0...v2.6.7)

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

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

package.json

@@ -6,7 +6,7 @@
     "ws": "7.2.0",
     "commander": "4.0.1",
     "zlib": "1.0.5",
-    "node-fetch": "2.6.0",
+    "node-fetch": "2.6.7",
     "util": "^0.12.3"
   }
 }