Replaced travis CI with github workflows for automated testing.

.github/workflows/python-package.yml

@@ -0,0 +1,52 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Tests
+
+on:
+  push:
+    branches: [ "*" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: '0 12 1 * *'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        os: [ubuntu-latest]
+
+    steps:
+
+    - name: check out
+      uses: actions/checkout@v3
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+
+    - name: Install package
+      run: |
+        python -m pip install -e .
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+
+    - name: Test with pytest
+      run: |
+        pytest tests -v
+

CHANGELOG.txt

@@ -754,3 +754,7 @@ Updated the pup marker to work with matplotlib v3.4+
 
 Getting the docs back to life.
 
+*****
+
+Replaced travis CI with github workflows for automated testing.
+