use github actions for testing.

.github/workflows/test-osx.yml

@@ -0,0 +1,37 @@
+name: Test OSX
+
+on:
+  push:
+    branches: [ develop, master ]
+  pull_request:
+    branches: [ develop, master ]
+
+jobs:
+  build:
+
+    runs-on: macOS-latest
+    strategy:
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: setup
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: prerequisites
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest pytest-asyncio mock flake8 pyyaml codecov pytest-cov
+    - name: lint
+      run: |
+        flake8 src/faber tests
+    - name: test
+      run: |
+        export PYTHONPATH=`pwd`/src
+        python -m faber.cli --info=tools cxx
+        pytest --cov=./src --compiler=native -vs
+    - name: coverage
+      run: |
+        codecov

.github/workflows/test-ubuntu.yml

@@ -0,0 +1,37 @@
+name: Test Ubuntu
+
+on:
+  push:
+    branches: [ develop, master ]
+  pull_request:
+    branches: [ develop, master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9', 'pypy-3.6', 'pypy-3.7']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: setup
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: prerequisites
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest pytest-asyncio mock flake8 pyyaml codecov pytest-cov
+    - name: lint
+      run: |
+        flake8 src/faber tests
+    - name: test
+      run: |
+        export PYTHONPATH=`pwd`/src
+        python -m faber.cli --info=tools cxx
+        pytest --cov=./src --compiler=native -vs
+    - name: coverage
+      run: |
+        codecov

.github/workflows/test-windows.yml

@@ -0,0 +1,38 @@
+name: Test Windows
+
+on:
+  push:
+    branches: [ develop, master ]
+  pull_request:
+    branches: [ develop, master ]
+
+jobs:
+  build:
+
+    runs-on: windows-2019
+    strategy:
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: setup
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: prerequisites
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest pytest-asyncio mock flake8 pyyaml codecov pytest-cov
+    - name: lint
+      run: |
+        flake8 src/faber tests
+    - name: test
+      shell: cmd
+      run: |
+        set PYTHONPATH=%cd%\\src
+        python -m faber.cli --info=tools cxx
+        pytest --cov=./src --compiler=native -vs
+    - name: coverage
+      run: |
+        codecov

README.md

@@ -1,14 +1,15 @@
 ![logo](https://github.com/stefanseefeld/faber/raw/develop/doc/_static/logo.png)
 
 
-Linux & OSX: [![travis-ci](https://travis-ci.org/stefanseefeld/faber.svg?branch=develop)](https://travis-ci.org/stefanseefeld/faber)
-Windows: [![appveyor](https://ci.appveyor.com/api/projects/status/vci9pp0endmqcayp/branch/develop?svg=true)](https://ci.appveyor.com/project/stefanseefeld/faber/branch/develop)
+CI: ![Linux](https://github.com/stefanseefeld/faber/workflows/Test%20Ubuntu/badge.svg)
+ ![OSX](https://github.com/stefanseefeld/faber/workflows/Test%20OSX/badge.svg)
+ ![Windows](https://github.com/stefanseefeld/faber/workflows/Test%20Windows/badge.svg)
+
 Code coverage: [![codecov.io](https://codecov.io/gh/stefanseefeld/faber/branch/develop/graph/badge.svg)](https://codecov.io/gh/stefanseefeld/faber)
 
 This project started as a clone of [Boost.Build](https://github.com/boostorg/build/), to experiment with a new Python frontend.
 Meanwhile it has evolved into a new build system, which retains most of the features found in Boost.Build, but with (hopefully !)
 much simplified logic, in addition of course to using Python as scripting language, rather than Jam.
-The original bjam engine is still in use as scheduler, though at this point that is mostly an implementation detail.
 
 
 Building and Installing