ci: transition from circleci to github workflows

.github/workflows/test.yaml

@@ -0,0 +1,60 @@
+# This is a GitHub workflow defining a set of jobs with a set of steps.
+# ref: https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions
+#
+name: Test
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  flake8:
+    name: Run flake8
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+
+      - name: Install Python dependencies
+        run: |
+          pip install --no-cache-dir -r dev-requirements.txt
+          pip install .
+
+      - name: Run tests
+        run: |
+          flake8
+
+  pytest:
+    name: Run pytests
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - python-version: 3.6
+          - python-version: 3.7
+          - python-version: 3.8
+          - python-version: 3.9
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "${{ matrix.python-version}}"
+
+      - name: Install Python dependencies
+        run: |
+          pip install --no-cache-dir -r dev-requirements.txt
+          pip install .
+
+      - name: Run tests
+        continue-on-error: ${{ matrix.accept-failure == true }}
+        run: |
+          pytest --verbose --maxfail=2 --color=yes
+
+      - name: Upload code coverage report
+        run: codecov

README.md

@@ -1,12 +1,9 @@
 # Native Authenticator
 
-
-[![Circle Ci Badge](https://img.shields.io/circleci/project/github/jupyterhub/nativeauthenticator.svg)](https://circleci.com/gh/jupyterhub/nativeauthenticator)
-
-![Code Cov](https://img.shields.io/codecov/c/github/jupyterhub/nativeauthenticator.svg)
-
-[![Documentation build status](https://img.shields.io/readthedocs/native-authenticator?logo=read-the-docs&logoColor=white)](https://native-authenticator.readthedocs.org/en/latest/)
 [![Latest PyPI version](https://img.shields.io/pypi/v/jupyterhub-nativeauthenticator?logo=pypi&logoColor=white)](https://pypi.python.org/pypi/jupyterhub-nativeauthenticator)
+[![Documentation build status](https://img.shields.io/readthedocs/native-authenticator?logo=read-the-docs&logoColor=white)](https://native-authenticator.readthedocs.org/en/latest/)
+[![GitHub Workflow Status - Test](https://img.shields.io/github/workflow/status/jupyterhub/nativeauthenticator/Test?logo=github&label=tests)](https://github.com/jupyterhub/nativeauthenticator/actions)
+[![Code coverage](https://img.shields.io/codecov/c/github/jupyterhub/nativeauthenticator.svg)](https://codecov.io/github/jupyterhub/nativeauthenticator)
 <br>
 [![GitHub](https://img.shields.io/badge/issue_tracking-github-blue?logo=github)](https://github.com/jupyterhub/nativeauthenticator/issues)
 [![Discourse](https://img.shields.io/badge/help_forum-discourse-blue?logo=discourse)](https://discourse.jupyter.org/c/jupyterhub)