🐛 Add missing pytest-cov and pytest-asyncio dependencies

- Added `pytest-cov` and `pytest-asyncio` to `pyproject.toml` to ensure proper test execution and coverage reporting.
- Fixed the issue in GitHub Actions where tests failed due to missing dependencies.

pyproject.toml

@@ -37,7 +37,15 @@ requires-python = ">=3.7"
 
 [project.optional-dependencies]
 build = ["build", "twine"]
-dev = ["black", "bumpver", "isort", "flake8", "pytest"]
+dev = [
+    "black",
+    "bumpver",
+    "isort",
+    "flake8",
+    "pytest",
+    "pytest-cov",
+    "pytest-asyncio",
+]
 
 [project.urls]
 repository = "https://github.com/thecodecrate/python-middlewareable"