Add extra opt dependency group for type checking

Author: lucc

.github/workflows/ci.yml

@@ -35,10 +35,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install .
-        python -m pip install mypy
-        # vobject does fancy dynamic stuff that is hard to type-check
-        python -m pip install types-atomicwrites # types-vobject
+        python -m pip install .[typing]
     - name: Run the type checker
       run: mypy
 

pyproject.toml

@@ -37,6 +37,12 @@ doc = [
     'sphinx-autoapi',
     'sphinx-autodoc-typehints',
 ]
+typing = [
+    "mypy",
+    "types-atomicwrites",
+    # vobject does fancy dynamic stuff that is hard to type-check
+    #"types-vobject",
+]
 
 [project.urls]
 homepage = "https://github.com/lucc/khard"