Set peetube runner npm version

[ericgaspar]

Problem

• Description of why you made this PR

Solution

• And how do you fix that problem

PR Status

• [ ] Code finished and ready to be reviewed/tested
• [ ] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

[MadMan247]

Already a new version. 0.0.20 May be safest to keep the versioning as-is, though I don't think that provides an effective way for out-of-date runners to get updated. Thank you for your effort!