Bump version to Gazebo 11.3.0

[traversaro]

Version based on #36 with some fixes.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

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) and found it was in an excellent condition.

[wolfv]

this is ready @traversaro ? looks excellent to me :)

[traversaro]

Yes! I tried to check if we could port some other of @Tobias-Fischer *nix patches upstream, but most of them are actually due to a really peculiar cmake/conda bug. I will eventually report ot to cmake-feedstock as at the moment I don't have any idea how to approach it, and that fortunately does not affect most of CMake projects that instead use the so-called "Modern CMake".

[traversaro]

Yes! I tried to check if we could port some other of @Tobias-Fischer *nix patches upstream, but most of them are actually due to a really peculiar cmake/conda bug. I will eventually report ot to cmake-feedstock as at the moment I don't have any idea how to approach it, and that fortunately does not affect most of CMake projects that instead use the so-called "Modern CMake".

Related bug: conda-forge/cmake-feedstock#129 .