Add GitHub Actions workflow

.github/workflows/tests.yml

@@ -0,0 +1,43 @@
+name: Tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Add conda to $PATH
+      run: echo ::add-path::$CONDA/condabin
+
+    - name: Update conda
+      run: conda update -y -n base conda setuptools
+
+    - name: Init conda
+      run: |
+        conda init bash
+        conda info -a
+    - name: Create the conda environment
+      run: conda create -n jupyterlab-debugger --yes --quiet -c conda-forge nodejs jupyterlab=2 xeus-python=0.6.12 ptvsd python=$PYTHON_VERSION
+      env:
+        PYTHON_VERSION: '3.8'
+
+    - name: Build the extension
+      run: |
+        source "$CONDA/etc/profile.d/conda.sh"
+        conda activate jupyterlab-debugger
+        jlpm
+        jlpm run build
+
+    - name: Run the tests
+      run: |
+        source "$CONDA/etc/profile.d/conda.sh"
+        conda activate jupyterlab-debugger
+        export XEUS_LOG=1
+        jlpm run test

README.md

@@ -1,6 +1,6 @@
 # @jupyterlab/debugger
 
-[![Build Status](https://dev.azure.com/jupyterlab/jupyterlab/_apis/build/status/jupyterlab.debugger?branchName=master)](https://dev.azure.com/jupyterlab/jupyterlab/_build/latest?definitionId=3&branchName=master)
+![Github Actions Status](https://github.com/jupyterlab/debugger/workflows/tests/badge.svg)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyterlab/debugger/stable?urlpath=/lab/tree/examples/index.ipynb)
 [![npm](https://img.shields.io/npm/v/@jupyterlab/debugger.svg)](https://www.npmjs.com/package/@jupyterlab/debugger)