Switch CI to Github Actions

Author: lindonroberts

.github/workflows/python_testing.yml

@@ -0,0 +1,31 @@
+name: Python package unit testing
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9"]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install nose
+        pip install -r requirements.txt
+    - name: Build package
+      run: |
+        python setup.py build
+    - name: Run unit tests
+      run: |
+        nosetests -v

README.rst

@@ -2,8 +2,8 @@
 Py-BOBYQA: Derivative-Free Solver for Bound-Constrained Minimization
 ====================================================================
 
-.. image::  https://travis-ci.org/numericalalgorithmsgroup/pybobyqa.svg?branch=master
-   :target: https://travis-ci.org/numericalalgorithmsgroup/pybobyqa
+.. image::  https://github.com/numericalalgorithmsgroup/pybobyqa/actions/workflows/python_testing.yml/badge.svg
+   :target: https://github.com/numericalalgorithmsgroup/pybobyqa/actions
    :alt: Build Status
 
 .. image::  https://img.shields.io/badge/License-GPL%20v3-blue.svg