update ci to test on all major oses

Author: synacktraa

.github/workflows/main.yml

@@ -26,11 +26,12 @@ jobs:
         run: make check
 
   tests-and-type-check:
-    runs-on: ubuntu-latest
     strategy:
       matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ["3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
+    runs-on: ${{ matrix.os }}
     defaults:
       run:
         shell: bash

cillow/interpreter.py

@@ -153,7 +153,7 @@ def is_running_in_jupyter() -> bool:
     """Check if the interpreter is running in a Jupyter notebook"""
     try:
         shell = get_ipython().__class__.__name__  # type: ignore[name-defined]
-        return shell == "ZMQInteractiveShell"
+        return shell == "ZMQInteractiveShell"  # type: ignore[no-any-return]
     except NameError:
         return False
 
@@ -178,7 +178,7 @@ def default_stream_processor(stream: Stream | ByteStream) -> None:
     if stream.type == "image":
         if is_running_in_jupyter():
             # Render the image in the Jupyter notebook output cell
-            from IPython.display import Image, display  # type: ignore[unused-ignore]
+            from IPython.display import Image, display  # type: ignore[unused-ignore,import-not-found]
 
             display(Image(data=stream.data))
         else: