[issue-267] Add GitHub Actions workflow

.github/workflows/install_and_test.yml

@@ -0,0 +1,28 @@
+name: Install and Test
+
+on: [ push, workflow_dispatch, pull_request ]
+
+jobs:
+  install_and_test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Installation
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade setuptools wheel setuptools_scm build
+          python -m build -nwx .
+          python -m pip install --upgrade ./dist/*.whl
+          python -m pip install pytest
+        shell: bash
+      - name: Run tests
+        run: pytest

README.md

@@ -1,20 +1,11 @@
 # Python library to parse, validate and create SPDX documents
 
-| Linux                          | macOS                         | Windows                         |
-|:-------------------------------|:------------------------------|:--------------------------------|
-| [ ![Linux build status][1]][2] | [![macOS build status][3]][4] | [![Windows build status][5]][6] |
+CI status (Linux, macOS and Windows): [![Install and Test][1]][2]
 
-[1]: https://travis-ci.org/spdx/tools-python.svg?branch=master
+[1]: https://github.com/spdx/tools-python/actions/workflows/install_and_test.yml/badge.svg
 
-[2]: https://travis-ci.org/spdx/tools-python
+[2]: https://github.com/spdx/tools-python/actions/workflows/install_and_test.yml
 
-[3]: https://circleci.com/gh/spdx/tools-python/tree/master.svg?style=shield&circle-token=36cca2dfa3639886fc34e22d92495a6773bdae6d
-
-[4]: https://circleci.com/gh/spdx/tools-python/tree/master
-
-[5]: https://ci.appveyor.com/api/projects/status/0bf9glha2yg9x8ef/branch/master?svg=true
-
-[6]: https://ci.appveyor.com/project/spdx/tools-python/branch/master
 
 # CURRENT STATE