Write main part of `ci.yml`

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    name: Linter
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Run linter
+        uses: psf/black@stable
+  mypy:
+    name: Mypy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.10
+      - name: Install dependencies
+        run: pip install mypy
+      - name: Run mypy
+        run: mypy .
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.10
+      - name: Install dependencies
+        run: |
+          pip install 
+      - name: Run tests
+        run: pytest