npm publish fails on latest when next exists

[jpraynaud]

Why

The publication of the npm packages is not working as expected, and fails when the same version exists with a different tag.

What

Update the release process on npm registry, and avoid creating a new version on release, just replace its tags instead.

How

• Remove the next and add the latest tags to the package during release process in CD
  • npm dist-tag add @mithril-dev/mithril-client-wasm@0.2.0 latest
  • npm dist-tag rm @mithril-dev/mithril-client-wasm@0.2.0 next