Update pre-commit-config and tweak settings

- Add isort pre-commit hook.
- Fix the case of flake8 pre-commit hook url.
- Ignore W503 flake8 rule to enforce W504 instead.
- Standardize setuptools-scm formatting matching setup-cfg-fmt enforcement

Author: MHendricks

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
     hooks:
     -   id: black
 
--   repo: https://gitlab.com/pycqa/flake8
+-   repo: https://github.com/PyCQA/flake8
     rev: 3.9.1
     hooks:
     -   id: flake8
@@ -30,3 +30,9 @@ repos:
       - id: end-of-file-fixer
       - id: requirements-txt-fixer
       - id: trailing-whitespace
+
+-   repo: https://github.com/PyCQA/isort
+    rev: 5.10.1
+    hooks:
+      - id: isort
+        name: isort (python)

pyproject.toml

@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "setuptools >= 44.1.1",
-    "setuptools_scm[toml] >= 4, <6",
+    "setuptools-scm[toml] >= 4, <6",
     "wheel >= 0.36",
 ]
 build-backend = "setuptools.build_meta"

setup.cfg

@@ -38,7 +38,7 @@ python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*
 include_package_data = True
 setup_requires =
     setuptools
-    setuptools_scm[toml]>=4,<6
+    setuptools-scm[toml]>=4,<6
     wheel
 
 [options.packages.find]
@@ -67,7 +67,8 @@ select = B, C, E, F, N, W, B9
 extend-ignore =
     E203,
     E501,
-    E722
+    E722,
+    W503,
 max-line-length = 80
 exclude =
     *.egg-info