Replace travis with Github Actions

Author: mbanczerowski

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7.3
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements-dev.txt
+      - name: Run tests
+        run: |
+          pytest

.travis.yml

@@ -33,7 +33,7 @@ class Cookie:
 
 @dataclass
 class NextStep:
-    """Return this from :meth:`.authenticate` or :meth:`.pass_login_credentials` to open client built-in browser with given url.
+    R"""Return this from :meth:`.authenticate` or :meth:`.pass_login_credentials` to open client built-in browser with given url.
     For example:
 
     .. code-block:: python