Bump node-fetch from 1.7.3 to 2.6.1 (#280)

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 1.7.3 to 2.6.1.
- [Release notes](https://github.com/bitinn/node-fetch/releases)
- [Changelog](https://github.com/node-fetch/node-fetch/blob/master/docs/CHANGELOG.md)
- [Commits](node-fetch/node-fetch@1.7.3...v2.6.1)

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Author: dependabot[bot]

package-lock.json

@@ -57,7 +57,7 @@
         "js-beautify": "^1.7.4",
         "json2yaml": "^1.1.0",
         "minimist": "^1.2.0",
-        "node-fetch": "^1.7.3",
+        "node-fetch": "^2.6.1",
         "npm": "^6.13.4",
         "object-assign-deep": "^0.3.1",
         "ora": "^1.3.0",