Replace Travis and Appveyor with Github Actions

.github/workflows/docs.yml

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+name: Docs Tests
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu]
+        python-version: [ '3.6' ]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v1
+    - name: Install Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: 'x64'
+    - name: Upgrade packaging dependencies
+      run: |
+        pip install --upgrade pip setuptools wheel
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+    - name: Cache pip
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('setup.py') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-${{ matrix.python-version }}-
+          ${{ runner.os }}-pip-
+    - name: Install the Python dependencies
+      run: |
+        pip install -e .[test] codecov
+        pip install -r docs/doc-requirements.txt
+        wget https://github.com/jgm/pandoc/releases/download/1.19.1/pandoc-1.19.1-1-amd64.deb && sudo dpkg -i pandoc-1.19.1-1-amd64.deb
+    - name: List installed packages
+      run: |
+        pip freeze
+        pip check
+    - name: Run tests on documentation
+      run: |
+        EXIT_STATUS=0
+        make -C docs/ html || EXIT_STATUS=$?
+        pytest --nbval --current-env docs || EXIT_STATUS=$?
+        exit $EXIT_STATUS

.github/workflows/js.yml

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+name: Linux JS Tests
+
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu, macos]
+        group: [notebook, base, services]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - name: Set up Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: '12.x'
+
+      - name: Cache node modules
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-node-modules
+        with:
+          # npm cache files are stored in `~/.npm` on Linux/macOS
+          path: ~/.npm
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Cache pip on Linux
+        uses: actions/cache@v1
+        if: startsWith(runner.os, 'Linux')
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ matrix.python }}-${{ hashFiles('**/requirements.txt', 'setup.py') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-${{ matrix.python }}
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade pip
+          pip install --upgrade setuptools wheel
+          npm install
+          npm install -g [email protected] [email protected]
+          pip install .[test]
+
+      - name: Run Tests
+        run: |
+          python -m notebook.jstest ${{ matrix.group }}

.github/workflows/python-nbconvert.yml

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+# The NBConvert Service requires pandoc. Instead of testing
+# Pandoc on every operating system (which should already be
+# done in nbconvert directly), we'll only test these services
+# on ubuntu where we can easily load Pandoc from a Github
+# Actions docker image (this docker image is not on other
+# operating systems).
+name: NBConvert Service Tests
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ '3.6' , '3.7', '3.8', '3.9' ]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v1
+    - name: Install Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: 'x64'
+    - name: Setup Pandoc
+      uses: r-lib/actions/setup-pandoc@v1
+    - name: Upgrade packaging dependencies
+      run: |
+        pip install --upgrade pip setuptools wheel
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+    - name: Cache pip
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('setup.py') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-${{ matrix.python-version }}-
+          ${{ runner.os }}-pip-
+    - name: Install the Python dependencies
+      run: |
+        pip install -e .[test]
+    - name: Run NBConvert Tests
+      run: |
+        pytest notebook/nbconvert/tests/
+    - name: Run NBConvert Service Tests
+      run: |
+        pytest notebook/services/nbconvert/tests/

.github/workflows/python.yml

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+name: Python Tests
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu, macos, windows]
+        python-version: [ '3.6' , '3.7', '3.8', '3.9' ] # Windows 3.9 fails due to the pywinpty dependency not working
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v1
+    - name: Install Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: 'x64'
+    - name: Upgrade packaging dependencies
+      run: |
+        pip install --upgrade pip setuptools wheel --user
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+    - name: Cache pip
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('setup.py') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-${{ matrix.python-version }}-
+          ${{ runner.os }}-pip-
+    - name: Install the Python dependencies
+      run: |
+        pip install -e .[test] codecov
+    - name: List installed packages
+      run: |
+        pip freeze
+        pip check
+    - name: Run Server-side tests
+      run: |
+        pytest -vv --cov notebook --cov-branch --cov-report term-missing:skip-covered --ignore-glob=notebook/tests/selenium/* --ignore-glob=notebook/nbconvert/tests/* --ignore-glob=notebook/services/nbconvert/tests/*
+    - name: Run Integration Tests
+      run: |
+        pytest -v notebook/tests/test_notebookapp_integration.py --integration_tests
+    - name: Coverage
+      run: |
+        codecov

.github/workflows/selenium.yml

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+name: Selenium Tests
+
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu, macos]
+        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: 'x64'
+
+    - name: Set up Node
+      uses: actions/setup-node@v1
+      with:
+        node-version: '12.x'
+
+    - name: Install JS
+      run: |
+        npm install
+
+    - name: Install Python dependencies
+      run: |
+        python -m pip install -U pip setuptools wheel
+        pip install --upgrade selenium
+        pip install pytest
+        pip install .[test]
+
+    - name: Run Tests
+      run: |
+        export JUPYTER_TEST_BROWSER=firefox
+        export MOZ_HEADLESS=1
+        pytest -sv notebook/tests/selenium