GitHub Actions runs shell steps with bash -e, so when npm view wickra@<v>
returned exit 1 (because the package was not yet on the registry) the
whole step aborted before reaching npm publish. Switch the step to
`set +e` and capture the rc explicitly, so a 404 from npm view is
treated as 'not published yet, go publish' instead of a fatal error.
Also adds a single retry after 30s for spam-filter blocks.
kingchenc
827cdc7a6b