Fix failing CI

The `pytest-flake8` plugin broke with a recent update of `flake8`.
According to this thread: pytest-dev/pytest#9217 (comment)
running these kinds of checks within `pytest` is an anti-pattern and should be avoided.
So I've moved `black`, `mypy`, and `flake8` checks away from their pytest plugins.

.github/workflows/test.yml

@@ -42,15 +42,15 @@ jobs:
 
       - name: Flake8 lints
         run: |
-          python -m pytest --flake8 parselglossy
+          python -m flake8 parselglossy
 
       - name: Black lints
         run: |
-          python -m pytest --black parselglossy
+          python -m black --check parselglossy
 
       - name: Mypy lints
         run: |
-          python -m pytest --mypy parselglossy
+          python -m mypy parselglossy
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3

parselglossy/grammars/atoms.py

@@ -34,9 +34,10 @@
 
 try:
     import pyparsing as pp
+
     if pp.__version__.split(".")[0] < "3":
-       # Import local copy
-       from . import pyparsing as pp  # type: ignore
+        # Import local copy
+        from . import pyparsing as pp  # type: ignore
 except ImportError:
     # Import local copy
     from . import pyparsing as pp  # type: ignore

parselglossy/grammars/getkw.py

@@ -43,9 +43,10 @@
 
 try:
     import pyparsing as pp
+
     if pp.__version__.split(".")[0] < "3":
-       # Import local copy
-       from . import pyparsing as pp  # type: ignore
+        # Import local copy
+        from . import pyparsing as pp  # type: ignore
 except ImportError:
     # Import local copy
     from . import pyparsing as pp  # type: ignore

pyproject.toml

@@ -74,10 +74,7 @@ test = [
     "coverage",
     "hypothesis",
     "pytest",
-    "pytest-black",
     "pytest-cov",
-    "pytest-flake8",
-    "pytest-mypy",
     "pytest-sugar",
 ]
 dev = [