Replace travis to github actions

Author: jungtaekkim

.github/workflows/pytest.yml

@@ -0,0 +1,28 @@
+name: pytest
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        python-version:
+          - 3.6
+          - 3.7
+          - 3.8
+          - 3.9
+          - 3.10
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip setuptools
+          pip install pytest
+      - name: Run pytest
+        run: |
+          pip install .
+          pytest