build(deps): bump node-fetch from 1.7.3 to 2.6.7

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 1.7.3 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@1.7.3...v2.6.7)

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

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

Author: dependabot[bot]

package-lock.json

@@ -11,7 +11,7 @@
   "license": "CC0-1.0",
   "dependencies": {
     "bluebird": "^3.4.1",
-    "node-fetch": "^1.5.3",
+    "node-fetch": "^2.6.7",
     "querystring": "^0.2.0",
     "redis": "^2.6.3",
     "restify": "^4.2.0",