Selecting among ros versions does not make much sense anymore, so drop the
corresponding package alternative and use whatever system version is
there (see comments in issue #391). System packages are searched in
/opt/ros/{noetic,melodic} only, in this order, but this can be tuned in
user configuration if needed.

Individual DEPEND_ABI.* can still be used for packages that have specific
requirements. They have be set to match any ros version more recent than
'lunar' by default.

Changes in v1.4.4:
- fix for eigenpy 3.1.0

Changes in v1.6.5:
- remove shortcuts
- update CMake
- update pre-commit

Changes in v3.4.2:
- setup pre-commit
- drop travis
- update CMake

Changes in v4.2.8:
- fix const correctness for C++17
- update README
- setup pre-commit
- add missing include

Changes in v1.2.3:
- fix submodule url
- update tools & badge
- setup pre-commit
- update CMake

Changes in v2.0.5:
- tests: require example-robot-data
- CMake: fetch submodule, set default build type, bump standard
- sync submodule
- pre-commit autoupdate

Changes in v3.0.3:
- fix for eigenpy v3
- CMake: fetch submodule, setup default build type, bump standard
- setup isort
- symc submodule
- pre-commit autoupdate

Changes in v1.4.3:
- update for eigenpy v3
- drop travis
- update cmake
- update pre-commit
- fix tests

Changes in v1.3.0:
-  Disable python builds by default
- Fix setter for gains
- Fix package.xml

Changes in v1.1.0:
-  Disable python builds by default
- Add setter for hip stiffness
- Add specific setter for damping and do not update damping from stiffness value