Avoid modifying tracked file before pypi upload

Author: jcapriot

azure-pipelines.yml

@@ -82,8 +82,9 @@ stages:
         - bash: |
             source "${HOME}/conda/etc/profile.d/conda.sh"
             source "${HOME}/conda/etc/profile.d/mamba.sh"
-            echo "  - python="$(python.version) >> environment_test.yml
-            mamba env create -f environment_test.yml
+            cp environment_test.yml environment_test_with_pyversion.yml
+            echo "  - python="$(python.version) >> environment_test_with_pyversion.yml
+            mamba env create -f environment_test_with_pyversion.yml
             conda activate discretize-test
             pip install pytest-azurepipelines
           displayName: Create Anaconda testing environment