Try install tensorflow 2.0

.gitlab-ci.yml

@@ -68,6 +68,8 @@ full:
     - apt install -y ninja-build
     - python -m pip install -U cppimport pybind11
     - python -m pip install --upgrade git+https://github.com/sympy/sympy.git
+    - python -m pip install --upgrade pip setuptools wheel
+    - python -m pip install --upgrade tensorflow-gpu=2.0
     - python -m pip install -e .
     - python -m pip install git+https://i10git.cs.fau.de/seitz/pystencils.git
     - pytest