Merge pull request #1016 from Textualize/python311

Add Python 3.11 to CI, update install-poetry action

Author: willmcgugan

.github/workflows/pythonpackage.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
     defaults:
       run:
         shell: bash
@@ -20,7 +20,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
           architecture: x64
       - name: Install and configure Poetry
-        uses: snok/install-poetry@v1.1.6
+        uses: snok/install-poetry@v1.3.3
         with:
           version: 1.2.2
           virtualenvs-in-project: true

src/textual/app.py

@@ -642,6 +642,7 @@ async def press_keys() -> None:
                             await asyncio.sleep(0.02)
 
                     await app._animator.wait_for_idle()
+                    await asyncio.sleep(0.05)
 
                     if screenshot:
                         self._screenshot = self.export_screenshot(