Main documentation seems to not link to scaladoc / javadoc

[vreuter-eisai]

Ideally, the main documentation should link to the API documentation, e.g. https://javadoc.io/static/org.sangria-graphql/sangria_2.12/2.1.2/index.html

[yanns]

👍

Somehow the javadoc is not pushed for the last versions: https://javadoc.io/doc/org.sangria-graphql/sangria_2.13/3.0.0/index.html

Something to check before putting it on the documentation.