Utilize GitHub actions

.github/workflows/python-package.yml

@@ -0,0 +1,39 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['2.7', '3.5', '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 flake8 pylint coveralls matplotlib
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install .
+    - name: Lint with pylint and flake8
+      run: |
+        flake8 graphslam/ && pylint graphslam/ && flake8 tests/ && pylint tests/
+    - name: Test with unittest
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        coverage run --source graphslam -m unittest discover -s tests/ -t . && coverage report -m && coveralls