Replace travis with Github Actions

Author: sebastinas

.github/workflows/build.yaml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  schedule:
+  # run at 7:00 on the first of every month
+  - cron: '0 7 1 * *'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, pypy3]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install "blessings>=1.5" "wcwidth>=0.1.4" mock pyte nose
+    - name: Build with Python ${{ matrix.python-version }}
+      run: |
+        python setup.py build
+    - name: Test with nosetest
+      run: |
+        nosetests .