Update mypy options to check all paths by default

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

pyproject.toml

@@ -180,7 +180,8 @@ namespace_packages = true
 # used but getting the original ignored error when removing the type: ignore.
 # See for example: https://github.com/python/mypy/issues/2960
 no_incremental = true
-packages = ["frequenz.sdk"]
+mypy_path = "src"
+files = ["src", "tests", "examples", "benchmarks", "docs", "noxfile.py"]
 strict = true
 
 [[tool.mypy.overrides]]