fix cargo warnings from workspace default features not set

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• fix the warnings generated for cargo build and others after the toolchain bump.

When specifying a workspace dependency it is not obvious, and rather surprising that, not specifying default-features = false in the workspace dependency, means that any default-features = false is ignored in any member crate.

This I assume is because the features of workspace dependencies are additive, and by not specifying default-features = false, the default features are automatically and always enabled.

rust-lang/cargo#11329 (comment)

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

[hanabi1224]

Not sure if it's worth the effort to add the check to the ruby script

[LesnyRumcajs]

Not sure if it's worth the effort to add the check to the ruby script

I don't think so. The warning implies that it may become a hard error in the future, plus everyone compiling Forest will immediately see it anyway.