`mathjax@4.0.0-alpha.1` should not be tagged as `latest`

Created by: tamuratak

Issue Summary

mathjax@4.0.0-alpha.1 is tagged as latest at the npmjs.com registry:

• https://www.npmjs.com/package/mathjax?activeTab=versions

It should be tagged as beta or dev. Now, executing npm i mathjax installs mathjax@4.0.0-alpha.1.

See:

By default, the latest tag is used by npm to identify the current version of a package, and npm install (without any @ or @ specifier) installs the latest tag.

• https://docs.npmjs.com/cli/v7/commands/npm-dist-tag#purpose

Technical details:

• MathJax Version: mathjax@4.0.0-alpha.1