Update dependency node-fetch to v2.7.0

Author: renovate[bot]

backend/.cache/plugins/strapi-plugin-upload/package.json

@@ -26,7 +26,7 @@
     "koa-range": "0.3.0",
     "koa-static": "^5.0.0",
     "lodash": "4.17.21",
-    "node-fetch": "2.6.1",
+    "node-fetch": "2.7.0",
     "react": "^16.14.0",
     "react-copy-to-clipboard": "^5.0.3",
     "react-dom": "^16.9.0",