Update version.ts

Update vesion.ts to current version

Try to fix Travis-CI to deply properly

Fix npm configuration so publishing works?

Merge pull request #974 from mathjax/v4.0-beta.3

Update version to beta.3

Fix mj-context-menu dependencies

Update package scripts to avoid non-zero exit code

Update npm api_key

Merge branch 'develop'

Merge branch 'develop'