gz_cmake_vendor: 0.2.0-1 in 'rolling/distribution.yaml' [bloom]

[azeey]

Increasing version of package(s) in repository gz_cmake_vendor to 0.2.0-1:

• upstream repository: https://github.com/gazebo-release/gz_cmake_vendor.git
• release repository: https://github.com/ros2-gbp/gz_cmake_vendor-release.git
• distro file: rolling/distribution.yaml
• bloom version: 0.12.0
• previous version for package: 0.1.1-1

gz_cmake_vendor

* Bump version to 4.0.0 (#10 <https://github.com/gazebo-release/gz_cmake_vendor/issues/10>)
* Fixes the cmake-config used during find_package (#8 <https://github.com/gazebo-release/gz_cmake_vendor/issues/8>)
  The provided cmake-config was not actually working if one did

find_package(gz_cmake_vendor)
find_package(gz-cmake)

This because the config file tried to create aliases to targets
that don't exist. For example, gz-cmake4::gz-cmake4 is not exported
by gz-cmake.
* Remove the BUILD_DOCS cmake argument. (#9 <https://github.com/gazebo-release/gz_cmake_vendor/issues/9>)
It is apparently deprecated in newer Gazebo.
* Apply prerelease suffix and remove patch (#7 <https://github.com/gazebo-release/gz_cmake_vendor/issues/7>)
* Upgrade to Ionic
* Contributors: Addisu Z. Taddese, Chris Lalancette