update check pypi install workflow

Author: znicholls

.github/workflows/test-pypi-install.yml

@@ -1,8 +1,8 @@
 name: Test PyPI install
-on:
-  schedule:
-    # * is a special character in YAML so you have to quote this string
-    - cron:  '0 0 * * 3'
+on: push
+  # schedule:
+  #   # * is a special character in YAML so you have to quote this string
+  #   - cron:  '0 0 * * 3'
 
 jobs:
   test-installation:
@@ -18,6 +18,13 @@ jobs:
       uses: actions/setup-python@v1
       with:
         python-version: ${{ matrix.python-version }}
+    # no windows wheel for Python 3.6 cftime 1.3.1
+    # https://github.com/Unidata/cftime/issues/224
+    - name: Install cftime 1.3.0 (${{ runner.os }})
+      if: startsWith(runner.os, 'Windows') && endsWith(matrix.python-version, '3.6')
+      run: |
+        pip install --upgrade --user pip wheel
+        pip install cftime==1.3.0
     - name: Install package
     # avoid installing pre-releases of non-scmdata packages
       run: |