Fix nuxeo-elements publish to NPMJS

lerna info Executing command in 4 packages: "npm publish --@nuxeo:registry=https://registry.npmjs.org/ --access public"
npm notice
npm notice 📦  @nuxeo/testing-helpers@3.0.9
npm notice === Tarball Contents ===
npm notice 580B  LICENSE
npm notice 1.0kB index.js
npm notice 5.0kB nuxeo-mock-client.js
npm notice 5.6kB test-helpers.js
npm notice 524B  package.json
npm notice 1.5kB README.md
npm notice === Tarball Details ===
npm notice name:          @nuxeo/testing-helpers
npm notice version:       3.0.9
npm notice package size:  4.5 kB
npm notice unpacked size: 14.2 kB
npm notice shasum:        64cfa2618d26f57fa5370bded464b9815350c36a
npm notice integrity:     sha512-PwPW7mzYyXUqc[...]iWdHUuGnmteRQ==
npm notice total files:   6
npm notice
npm ERR! code E404
npm ERR! 404 Not Found - PUT https://registry.npmjs.org/@nuxeo%2ftesting-helpers - Not found
npm ERR! 404
npm ERR! 404  '@nuxeo/testing-helpers@3.0.9' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
npm ERR! 404
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/rdias/.npm/_logs/2022-01-10T17_24_33_149Z-debug.log
lerna ERR! npm publish --@nuxeo:registry=https://registry.npmjs.org/ --access public exited 1 in '@nuxeo/testing-helpers'