Fix/update Windows CI (#330)

* Don't install into hidden folder

The actions/upload-artifacts@v4 ignores hidden folders (unless
explicitly told not to), and there is no need for that.  Instead we
install into a folder outside of the sources.

* Update to setup-php-sdk v0.10 and enable caching

The latter should bring a considerable performance improvement.

* Install to folder inside checkout

The upload action is picky about "relative paths", so we work around.

.github/workflows/windows.yml

@@ -28,11 +28,12 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup PHP
         id: setup-php
-        uses: php/setup-php-sdk@v0.9
+        uses: php/setup-php-sdk@v0.10
         with:
           version: ${{matrix.version}}
           arch: ${{matrix.arch}}
           ts: ${{matrix.ts}}
+          cache: true
       - name: Fetch dependencies
         run: |
           curl -LO https://downloads.php.net/~windows/pecl/deps/pthreads-3.0.0-vs16-${{matrix.arch}}.zip
@@ -52,20 +53,20 @@ jobs:
         run: nmake test TESTS="--show-diff tests"
       - name: package
         run: |
-          md .install
-          copy LICENSE .install
-          copy README.md .install
+          md win-install
+          copy LICENSE win-install
+          copy README.md win-install
           if exist x64 (
             if exist x64\Release (set prefix=x64\Release) else set prefix=x64\Release_TS
           ) else (
             if exist Release (set prefix=Release) else set prefix=Release_TS
           )
-          copy %prefix%\php_parallel.dll .install
-          copy %prefix%\php_parallel.pdb .install
-          copy ..\deps\COPYING .install\COPYING.PTHREADS
-          copy ..\deps\bin\* .install
+          copy %prefix%\php_parallel.dll win-install
+          copy %prefix%\php_parallel.pdb win-install
+          copy ..\deps\COPYING win-install\COPYING.PTHREADS
+          copy ..\deps\bin\* win-install
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           name: parallel-${{matrix.version}}
-          path: .install
+          path: win-install