Use black and isort to autoformat the main package (#266)

* Add linting job.

* Run black and isort.

* Keep working on formatting.

* Forgot to install the linters...

* Wrong code path.

* Address style issues in cubids.

* Address style issues in validator.

* Update metadata_merge.py

.github/workflows/lint.yml

@@ -19,8 +19,8 @@ jobs:
         python-version: '3.7'
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        python -m pip install --upgrade tox
+        pip install flake8 flake8-absolute-import flake8-black flake8-docstrings \
+        flake8-isort flake8-pyproject flake8-unused-arguments \
+        flake8-use-fstring pep8-naming
     - name: Run linters
-      run: |
-        tox -e codespell
+      run: python -m flake8 cubids

cubids/__init__.py

@@ -1,7 +1,11 @@
 """Top-level package for CuBIDS."""
 
 __author__ = """PennLINC"""
-__email__ = '[email protected]'
-__version__ = '0.1.0'
+__email__ = "[email protected]"
+__version__ = "0.1.0"
 
-from .cubids import CuBIDS
+from cubids.cubids import CuBIDS
+
+__all__ = [
+    "CuBIDS",
+]