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>

Author: dependabot[bot]

package-lock.json

@@ -9,7 +9,7 @@
     "eos-cljs": "./eos-cljs",
     "eosjs": "^20.0.3",
     "merkletreejs": "^0.2.24",
-    "node-fetch": "^2.6.1"
+    "node-fetch": "^2.6.7"
   },
   "scripts": {
     "test": "lumo -K -c tests -m e2e.network",