Bump node-fetch from 2.6.0 to 2.6.1

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 2.6.0 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@v2.6.0...v2.6.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -56,7 +56,7 @@
     "lodash": "^4.17.19",
     "mime-types": "^2.1.27",
     "mockttp": "^1.0.2",
-    "node-fetch": "^2.6.0",
+    "node-fetch": "^2.6.1",
     "node-forge": "^0.9.1",
     "node-gsettings-wrapper": "^0.5.0",
     "portfinder": "^1.0.25",