use conda packages in github action test environment instead of pip a…

…nd debian packages

.github/workflows/github-ubuntu.yaml

@@ -33,14 +33,8 @@ jobs:
           cache: "pip"
       - name: install_dependencies
         run: |
-          python -m pip install --upgrade pip
-          #The next three lines are used to install pyenchant on ubuntu
-          #(needed for sphinxcontrib-pyspelling)
-          if [runner.os == 'Linux']; then
-          sudo apt-get update -y
-          sudo apt-get install -y python-enchant; fi
-          pip install build pytest
-          pip install -r requirements.txt
+          conda install --yes -c conda-forge micromamba
+          micromamba install -c conda-forge --yes --file=environment.yaml
       - name: Display Python version and system info
         run: python -c "import platform; print(platform.uname())"
       - name: Display Python version and system info

environment.yaml

@@ -0,0 +1,21 @@
+# environment.yaml
+
+channels:
+  - conda-forge
+dependencies:
+  - python>=3.8
+  - conda-build
+  - tox-conda
+  - pandas
+  - pep517
+  - requests
+  - setuptools
+  - sphinx
+  - sphinxcontrib-apidoc
+  - sphinxcontrib-bibtex
+  - toml
+  - sphinx_rtd_theme
+  - numpydoc
+  - certifi
+  - cryptography
+  - pytest