Update tests to be run by GH Actions.

Author: Natim

.github/workflows/test.yml

@@ -0,0 +1,40 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: build (Python ${{ matrix.python-version }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.8', '3.9', '3.10']
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key:
+          ${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}
+        restore-keys: |
+          ${{ matrix.python-version }}-v1-
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install --upgrade tox tox-gh-actions
+    - name: Tox tests
+      run: |
+        tox -v

.travis.yml

@@ -2,7 +2,9 @@
 
 [![Travis Build Status](https://travis-ci.org/alma/alma-python-client.svg?branch=main)](https://travis-ci.org/alma/alma-python-client) [![PyPI](https://img.shields.io/pypi/v/alma-client.svg)](https://pypi.python.org/pypi/alma-client)
 
-Python API Client for the Alma API
+Python API Client for the Alma API.
+
+Support Python >= 3.8
 
 ## Install