Bump node-fetch from 2.6.6 to 2.6.7 (#20726)

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.6 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](https://github.com/node-fetch/node-fetch/compare/v2.6.6...v2.6.7)

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

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package.json

@@ -131,7 +131,7 @@
     "minimist": "^1.2.5",
     "mkdirp": "^1.0.4",
     "modernizr": "^3.11.7",
-    "node-fetch": "^2.6.1",
+    "node-fetch": "^2.6.7",
     "optimize-css-assets-webpack-plugin": "^5.0.4",
     "postcss-easings": "^2.0.0",
     "postcss-extend": "^1.0.5",