Test on windows using gh action

This seem to be much faster than appveyor

Author: Carreau

.github/workflows/windows-testing.yml

@@ -0,0 +1,55 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  windows:
+    name: Windows Tests
+    runs-on: "windows-latest"
+    strategy:
+      fail-fast: True
+      matrix:
+        python-version: ["3.8"]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          channels: conda-forge
+        env:
+          ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+      - name: Create Conda environment with the rights deps
+        shell: bash -l {0}
+        run: |
+          conda create -n zarr-env python==${{matrix.python-version}} numcodecs==0.6.4 pip
+      - name: Install dependencies
+        shell: bash -l {0}
+        run: |
+          conda activate zarr-env
+          python -m pip install --upgrade pip
+          python -m pip install -U pip setuptools wheel
+          python -m pip install -rrequirements_dev_minimal.txt numpy${{ matrix.numpy_version}} -rrequirements_dev_optional.txt
+          python -m pip install -e .
+          python -m pip freeze
+      - name: Run Tests
+        shell: bash -l {0}
+        run: |
+          conda activate zarr-env
+          pytest
+      - name: Conda info
+        shell: bash -l {0}
+        run: conda info
+      - name: Conda list
+        shell: pwsh
+        run: conda list
+