javacOptions passed to javadoc

[raboof]

javacOptions in unidoc are passed as options to javadoc

If javacOptions in unidoc contains options like -target 1.8, javadoc will fail because -target is not a valid option to javadoc.

Should we introduce a javadocOptions to use instead?

[scottsand-db]

I fixed this issue in my own repo here: https://github.com/delta-io/connectors/commit/9a0b8648e38fca1eeaf7ec87d9781dccef2b02c6

Compile / doc / javacOptions := (JavaUnidoc / unidoc / javacOptions).value,