Merge pull request #70 from goanpeca/enh/update-ci

PR: Smoke test with oldest version and add 3.8 to matrix

.github/workflows/ci.yml

@@ -11,10 +11,10 @@ jobs:
         task: ['pycodestyle']
     steps:
     - uses: actions/checkout@v1
-    - name: Set up Python 3.7
+    - name: Set up Python 3.5
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.5
     - name: Install dependencies
       run: |
         pip install --upgrade pip setuptools beefore
@@ -30,10 +30,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - name: Set up Python 3.7
+    - name: Set up Python 3.5
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.5
     - name: Install dependencies
       run: |
         pip install --upgrade pip setuptools pytest-tldr
@@ -49,7 +49,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.5, 3.6]
+        python-version: [3.6, 3.7, 3.8]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}