Add mypy

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>

Author: LecrisUT

.pre-commit-config.yaml

@@ -23,3 +23,11 @@ repos:
       - id: flake8
         args:
           - --max-line-length=120
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: "v1.4.1"
+    hooks:
+      - id: mypy
+        files: ^(src)
+        additional_dependencies:
+          - Click

pyproject.toml

@@ -70,3 +70,12 @@ testpaths = ["tests"]
 
 [tool.coverage]
 run.source = ["src"]
+
+[tool.mypy]
+strict = true
+files = ["src"]
+python_version = "3.9"
+warn_unused_configs = true
+show_error_codes = true
+disallow_untyped_defs = false
+follow_imports = "normal"