Migrate to GitHub Actions

Author: thomasrockhu-codecov

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: Workflow for Codecov example-python
+on: [push, pull_request]
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Run tests and collect coverage
+        run: coverage run tests.py
+      - name: Download and validate Codecov uploader
+        run: |
+          curl https://keybase.io/codecovsecurity/pgp_keys.asc | gpg --no-default-keyring --keyring trustedkeys.gpg --import # One-time step
+          curl -Os https://uploader.codecov.io/latest/linux/codecov
+          curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM
+          curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM.sig
+          gpgv codecov.SHA256SUM.sig codecov.SHA256SUM
+          shasum -a 256 -c codecov.SHA256SUM
+          chmod +x codecov
+      - name: Upload coverage to Codecov
+        run: ./codecov