fix(deps): bump node-fetch requirement to 2.6.7 (#447)

Fixes #448

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "@octokit/request-error": "^2.1.0",
     "@octokit/types": "^6.16.1",
     "is-plain-object": "^5.0.0",
-    "node-fetch": "^2.6.1",
+    "node-fetch": "^2.6.7",
     "universal-user-agent": "^6.0.0"
   },
   "devDependencies": {