[CI] Fix CI for optional dependencies (#1754)

Author: Vincent Moens

.github/unittest/linux_libs/scripts_d4rl/run_test.sh

@@ -35,8 +35,13 @@ lib_dir="${env_dir}/lib"
 conda deactivate && conda activate ./env
 
 # this workflow only tests the libs
-python -c "import gym, d4rl"
+printf "* Smoke test\n"
 
+python -c """import gym
+import d4rl
+"""
+
+printf "* Tests"
 python .github/unittest/helpers/coverage_run_parallel.py -m pytest test/test_libs.py --instafail -v --durations 200 --capture no -k TestD4RL --error-for-skips --runslow
 coverage combine
 coverage xml -i

.github/unittest/linux_libs/scripts_d4rl/setup_env.sh

@@ -40,11 +40,13 @@ if [ ! -d "${env_dir}" ]; then
 fi
 conda activate "${env_dir}"
 
+python3 -m pip install pip --upgrade
+
 #pip3 uninstall cython -y
 #pip uninstall cython -y
 #conda uninstall cython -y
-pip3 install "cython<3"
-conda install -c anaconda cython="<3.0.0" -y
+python3 -m pip install "cython<3" --upgrade
+#conda install -c anaconda cython="<3.0.0" -y
 
 
 # 3. Install mujoco