ENH: update package version to 0.4.0

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-webservice.

I've started a version update as instructed in #18.

I'm currently searching for new versions and will update this PR shortly if I find one! Thank you for waiting!

Fixes #18
Fixes #17

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• ℹ️ The recipe is not parsable by parser conda-souschef (grayskull). This parser is not currently used by conda-forge, but may be in the future. We are collecting information to see which recipes are compatible with grayskull.
• ℹ️ The recipe is not parsable by parser conda-recipe-manager. The recipe can only be automatically migrated to the new v1 format if it is parseable by conda-recipe-manager.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/13411337478. Examine the logs at this URL for more detail.}

[traversaro]

Thanks to robotology/gz-sim-yarp-plugins#238 in this PR I also fixed #17 .

[traversaro]

@conda-forge-admin please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/13411446044. Examine the logs at this URL for more detail.}

[traversaro]

Windows CI blocked by conda-forge/admin-requests#1395 .

[traversaro]

Windows CI blocked by conda-forge/admin-requests#1395 .

We can handle this later.