CI: Use conda-incubator/setup-miniconda action

Author: dalcinl

.github/workflows/main.yml

@@ -7,23 +7,28 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-    name: Python ${{ matrix.python-version }} example
+    name: Python ${{ matrix.python-version }} example (${{ matrix.os }})
+
+    defaults:
+      run:
+        shell: bash -el {0}
 
     steps:
+
     - uses: actions/checkout@v3
-    - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-    - name: setup-conda
-      uses: s-weigand/setup-conda@v1
+
+    - uses: conda-incubator/setup-miniconda@v2
       with:
-          update-conda: true
-          python-version: ${{ matrix.python-version }}
-          conda-channels: anaconda, conda-forge
-    - run: conda --version
-    - run: which python
-    - run: |
-        conda config --set always_yes yes
-        conda install -n root conda-build numpy fftw
-        conda build ./conf
+        miniforge-variant: Mambaforge
+        miniforge-version: latest
+        channel-priority: strict
+        python-version: ${{ matrix.python-version }}
+        conda-build-version: '*'
+
+    - run: conda install -n root numpy fftw
+    - run: conda build --python ${{ matrix.python-version }} ./conf
+    - run: conda install --use-local mpi4py_fft_test