replace Travis CI with GitHub actions

- Tests only (gratuitously expanded to MacOS and Windows), gh-ci.yml
- add docs action
- install pathlib2 for 2.7
- updated supported Python versions in setup.py (2.7, 3.6-3.9)

Author: orbeckst

.github/workflows/docs.yml

@@ -0,0 +1,51 @@
+name: docs deployment
+on:
+  push:
+    branches:
+      - master
+
+concurrency:
+  group: "${{ github.ref }}-${{ github.head_ref }}"
+  cancel-in-progress: true
+
+jobs:
+  docs:
+    if: github.repository == 'MDAnalysis/MDAnalysisData'
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Setup python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+
+    - name: Display Python version
+      run: python -c "import sys; print(sys.version)"
+
+    - name: Install sphinx, pytest, pytest plugins
+      run: |
+        python -m pip install wheel
+        python -m pip install pytest pytest-cov pytest-pep8 pytest-mock codecov
+        python -m pip install sphinx sphinx-sitemap sphinx-rtd-theme
+
+    - name: Install main dependencies
+      run: |
+        python -m pip install six setuptools tqdm
+
+    - name: install package
+      run: |
+        pip install -v .
+
+    - name: build docs
+      run: |
+        python setup.py build_sphinx
+
+    - name: deploy docs
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./build/sphinx/html
+        user_name: 'github-actions'
+        user_email: 'github-action@users.noreply.github.com'

.github/workflows/gh-ci.yml

@@ -0,0 +1,76 @@
+name: GH Actions CI
+
+on:
+  # run every Sunday at 3:53 UTC
+  schedule:
+    - cron: "53 3 * * 0"
+  push:
+    branches:
+      - "master"
+  pull_request:
+    branches:
+      - "master"
+
+concurrency:
+  group: "${{ github.ref }}-${{ github.head_ref }}"
+  cancel-in-progress: true
+
+jobs:
+  unittests:
+    name: Test ${{ matrix.os }} with Python ${{ matrix.python-version }}
+    if: github.repository == 'MDAnalysis/MDAnalysisData'
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        python-version: [2.7, 3.6, 3.7, 3.8, 3.9]
+        include:
+          - os: macOS-latest
+            python-version: 2.7	
+          - os: macOS-latest
+            python-version: 3.9
+          - os: windows-latest
+            python-version: 2.7	
+          - os: windows-latest
+            python-version: 3.9
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Setup python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Display Python version
+      run: python -c "import sys; print(sys.version)"
+
+    - name: Install testing dependencies (pytest, pytest plugins)
+      run: |
+        python -m pip install wheel
+        python -m pip install pytest pytest-cov pytest-pep8 pytest-mock codecov
+
+    - name: Install package dependencies
+      run: |
+        python -m pip install six setuptools tqdm
+
+    - name: Install compatibility dependencies for Python 2.7 only
+      if: startsWith(matrix.python-version, '2.7')
+      run: python -m pip install pathlib2 
+
+    - name: Install package
+      run: |
+        python -m pip install .
+
+    - name: Run tests
+      run: |
+        pytest -v --cov=MDAnalysisData --cov-report=xml --color=yes MDAnalysisData 
+
+    - name: Codecov
+      uses: codecov/codecov-action@v2
+      with:
+        name: codecov-${{ matrix.os }}-py${{ matrix.python-version }}
+        file: ./coverage.xml
+        fail_ci_if_error: True
+        verbose: True

.travis.yml

@@ -119,11 +119,10 @@ def dynamic_author_list():
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Topic :: Scientific/Engineering',
         'Topic :: Scientific/Engineering :: Bio-Informatics',
         'Topic :: Scientific/Engineering :: Chemistry',