FIX: modify ci tests to make them pass on windows

Author: wolfidan

.github/workflows/pyrad_tests_base.yml

@@ -45,8 +45,9 @@ jobs:
           repository: MeteoSwiss/pyrad-tests
           path: pyrad-tests
       - name: Setup Miniconda
-        uses: conda-incubator/setup-miniconda@v2.0.0
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
+          micromamba-version: '2.0.0-0'
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
           channels: conda-forge

.github/workflows/pyrad_tests_mch.yml

@@ -43,8 +43,9 @@ jobs:
           repository: MeteoSwiss/pyrad-tests
           path: pyrad-tests
       - name: Setup Miniconda
-        uses: conda-incubator/setup-miniconda@v2.0.0
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
+          micromamba-version: '2.0.0-0'
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
           channels: conda-forge

.github/workflows/pyrad_tests_mch_dev.yml

@@ -42,8 +42,9 @@ jobs:
           path: pyart
           ref: dev
       - name: Setup Miniconda
-        uses: conda-incubator/setup-miniconda@v2.0.0
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
+          micromamba-version: '2.0.0-0'
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
           channels: conda-forge