added CI

.github/workflows/build.yml

@@ -0,0 +1,43 @@
+name: Build and upload wheels
+
+on:
+  push:
+    branches: 
+      - '*'
+  pull_request:
+    branches: 
+      - '*'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-2019, ubuntu-18.04, macos-10.15]
+        python-version: [3.6, 3.7, 3.8, 3.9]
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: pip install wheel setuptools
+
+      - name: Build wheel
+        run: python setup.py bdist_wheel --universal
+
+      - name: Install software
+        run: pip install --find-links=${{github.workspace}}/dist/ lungtumormask
+
+      - name: Test CLI
+        run: lungtumormask --help
+
+      - name: Upload Python wheel
+        uses: actions/upload-artifact@v2
+        with:
+          name: Python wheel
+          path: ${{github.workspace}}/dist/lungtumormask-*.whl
+          if-no-files-found: error