ci: Stupid Windows support

Resolves: #514

.github/workflows/poetry-dev.yml

@@ -28,7 +28,7 @@ jobs:
           - 'ubuntu-18.04'
           # - 'macos-10.15'
           - 'macos-11.0'
-          - 'windows-2019'
+          - 'windows-latest'
         python-version:
           - '3.10'
       fail-fast: false
@@ -40,9 +40,18 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Install latest version of Poetry for Windows
+        if: matrix.os == 'windows-latest'
+        run: (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | python -
       - name: Install latest version of Poetry
+        if: matrix.os != 'windows-latest'
         run: curl -sSL https://install.python-poetry.org | python3 -
-      - name: Add Poetry to $PATH
+      - name: Add Poetry to PATH on Windows
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "%APPDATA%\Python\Scripts" >> $GITHUB_PATH
+      - name: Add Poetry to PATH
+        if: matrix.os != 'windows-latest'
         run: |
           echo "$HOME/.local/bin" >> $GITHUB_PATH