test: replace pytest-flake8 with pre-commit

There's weird behaviors with Flake8 interacting with pytest.

Instead of using pytest to run the tests, make it a pre-commit hook.

Resolves #82

Signed-off-by: Mike Fiedler <miketheman@gmail.com>

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.0.1
+    hooks:
+    -   id: check-yaml
+    -   id: check-added-large-files
+-   repo: https://github.com/editorconfig-checker/editorconfig-checker.python
+    rev: '2.4.0'
+    hooks:
+    -   id: editorconfig-checker
+        alias: ec
+-   repo: https://github.com/pycqa/flake8
+    rev: '4.0.1'
+    hooks:
+    -   id: flake8

pyproject.toml

@@ -38,7 +38,6 @@ pytest = ">=3.6.3"
 pytest = "^6.0"
 pytest-cov = "^2.8.1"
 pytest-httpbin = "^1.0"
-pytest-flake8 = "^1.0.4"
 asynctest = "^0.13.0"
 requests = "^2.26.0"
 starlette = "^0.14.2"

pytest.ini

@@ -2,4 +2,3 @@
 addopts =
     --cov
     --cov-report=term
-    --flake8