Change -dev to full Python 3.11 version (#509)

This also removes the pip patch which is no longer needed, since
Python 3.11 ships with a new pip version, which has the patch included.

.github/workflows/integration.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu, MacOS, Windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
       fail-fast: false
     defaults:
       run:

.github/workflows/tests.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu, MacOS, Windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
         include:
           - os: Ubuntu
             python-version: pypy-3.8
@@ -62,11 +62,6 @@ jobs:
           # Using `timeout` is a safeguard against the Poetry command hanging for some reason.
           timeout 10s poetry run pip --version || rm -rf .venv
 
-      # XXX: https://github.com/pypa/pip/issues/11352 causes random failures -- remove once fixed in a release.
-      - name: Upgrade pip on Python 3.11
-        if: ${{ matrix.python-version == '3.11-dev' }}
-        run: poetry run pip install git+https://github.com/pypa/pip.git@f8a25921e5c443b07483017b0ffdeb08b9ba2fdf
-
       - name: Install dependencies
         run: poetry install