Upgrade python version to python 3.8 in tooling configuration

Co-authored-by: Irtaza Akram <[email protected]>

Author: Pierre-Sassoulas

pyproject.toml

@@ -38,7 +38,7 @@ paths.source = [
 ]
 
 [tool.mypy]
-python_version = "3.7"
+python_version = "3.8"
 check_untyped_defs = true
 explicit_package_bases = true
 namespace_packages = true
@@ -91,8 +91,7 @@ ignore = [
     "RUF012", # Mutable class attributes should be annotated with `typing.ClassVar`
 ]
 
-# py36, but ruff does not support it :/
-target-version = "py37"
+target-version = "py38"
 
 [tool.ruff.pydocstyle]
 convention = "google"
@@ -115,7 +114,7 @@ convention = "google"
 
 [tool.pylint]
 
-py-version = "3.6"
+py-version = "3.8"
 
 ignore-paths="tests/input" # Ignore test inputs