Add Python 3.11 to CI. (#48)

Author: tobiasraabe

.github/workflows/main.yml

@@ -5,6 +5,9 @@ concurrency:
   group: ${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+env:
+  CONDA_EXE: mamba
+
 on:
   push:
     branches:
@@ -24,14 +27,16 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
       - uses: actions/checkout@v2
       - uses: conda-incubator/setup-miniconda@v2
         with:
-          auto-update-conda: true
+          auto-update-conda: false
           python-version: ${{ matrix.python-version }}
+          channels: conda-forge,nodefaults
+          mamba-version: "*"
 
       - name: Install core dependencies.
         shell: bash -l {0}