deps: update node-fetch to 2.6.8

[achingbrain]

https://github.com/node-fetch/node-fetch/pull/1172 finally got released so we can remove the fork now.

[github-actions[bot]]

:tada: This PR is included in version 9.0.14 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: