Restore conan install to latest version

.gitlab-ci.yml

@@ -24,7 +24,7 @@ workflow:
     - export PATH=$(readlink -e .)/python-${PYTHON_VERSION}-${PLATFORM}/bin:${PATH}
     - python --version | grep ${PYTHON_VERSION}
     - python -m pip install --upgrade pip 
-    - python -m pip install conan==2.0.7 
+    - python -m pip install conan
     # Install prerequisite for git-gui and gitk
     - sudo yum -y install tcl-devel tk-devel
     # Build git with conan