Added isort to requirements and lint check for all python versions

.github/workflow/lint.yml

@@ -0,0 +1,26 @@
+name: Lint Moonworm
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9]
+    steps:
+      - uses: actions/checkout@v2
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Upgrade pip
+        run: pip install -U pip
+      - name: Install dev dependencies
+        run: pip install -e .[dev]
+      - name: Mypy type check
+        run: mypy moonworm/
+      - name: Isort imports check
+        run: isort --check moonworm/
+      - name: Black syntax check
+        run: black --check moonworm/
+

.isort.cfg

@@ -0,0 +1,3 @@
+[settings]
+profile = black
+multi_line_output = 3

setup.py

@@ -16,6 +16,7 @@ setup(
         "dev": [
             "black",
             "mypy",
+            "isort",
             "wheel",
         ],
         "distribute": ["setuptools", "twine", "wheel"],