switch to mamba and update latest python

.gitlab-ci.yml

@@ -12,24 +12,24 @@ image: gitlab.kwant-project.org:5005/qt/research-docker
 
 test minimal requirements:
   script:
-    - conda env create -f environment-minimal.yml
+    - mamba env create -f environment-minimal.yml
     - source activate qsymm-minimal
     - py.test qsymm/ --cov=qsymm --verbose --cov-report term
   stage: test
 
 test latest requirements:
   script:
-    - conda env create -f environment-latest.yml
+    - mamba env create -f environment-latest.yml
     - source activate qsymm-latest
     - py.test qsymm/ --cov=qsymm --verbose --cov-report term
   stage: test
 
 test kwant against latest qsymm:
   script:
-    - conda env create -f environment-latest.yml
+    - mamba env create -f environment-latest.yml
     - source activate qsymm-latest
     # Get bleeding-edge Kwant
-    - conda install cython
+    - mamba install cython
     - pip install .  # need to install qsymm so that the kwant test can find it
     - pip install git+https://gitlab.kwant-project.org/kwant/kwant.git@stable
     - export KWANT_QSYMM_PATH=$(python -c "$KWANT_QSYMM_TEST_PATH_SCRIPT")

environment-latest.yml

@@ -2,7 +2,7 @@ name: qsymm-latest
 channels:
     - conda-forge
 dependencies:
-    - python=3.10
+    - python=3.11
     - numpy
     - scipy
     - sympy