Use windows-2025 for the Windows CI.

[skip alpine ci]
[skip ubuntu ci]

.github/workflows/ci-windows.yml

@@ -10,10 +10,18 @@ on:
 jobs:
   build:
     if: "!contains(github.event.head_commit.message, '[skip windows ci]')"
-    runs-on: windows-2019
+    runs-on: windows-2025
+    env:
+      BUILD_TYPE: ${{ github.event_name == 'release' && 'Release' || 'Debug' }}
+      CONAN_USER_HOME: ${{ github.workspace }}/win/build
+      CONAN_USER_HOME_SHORT: None
     steps:
       - uses: actions/checkout@v4
 
+      - name: Setup NSIS
+        run: |-
+          choco install nsis
+
       - name: Setup MSBuild
         uses: microsoft/setup-msbuild@v2
 
@@ -22,20 +30,34 @@ jobs:
         with:
           version: 1.64.0
 
+      - name: Try to restore libraries from the cache
+        uses: actions/cache/restore@v4
+        id: library-cache
+        with:
+          key: conan-${{ hashFiles('src/win32/conanfile.txt') }}
+          path: ${{ env.CONAN_USER_HOME }}/.conan
+
       - name: Install libraries
         run: |
           conan install ${{ github.workspace }}\src\win32 --build=missing
 
+      - name: Save libraries to the cache
+        if: ${{ steps.library-cache.outputs.cache-hit != 'true' }}
+        uses: actions/cache/save@v4
+        with:
+          key:  ${{ steps.library-cache.outputs.cache-primary-key }}
+          path: ${{ env.CONAN_USER_HOME }}/.conan
+
       - name: Run CMake
         run: |
           mkdir ${{ github.workspace }}\build
           cd ${{ github.workspace }}\build
-          cmake -A "x64" -D "CMAKE_BUILD_TYPE=${{ github.event_name == 'release' && 'Release' || 'Debug' }}" -G "Visual Studio 16 2019" ..
+          cmake -A x64 -D "CMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}" -G "Visual Studio 17 2022" ..
 
       - name: Build Anope
         working-directory: ${{ github.workspace }}\build
         run: |
-          msbuild PACKAGE.vcxproj /M:3 /P:Configuration=${{ github.event_name == 'release' && 'Release' || 'Debug' }} /P:Platform=x64 /VERBOSITY:MINIMAL
+          msbuild PACKAGE.vcxproj /M:5 /P:Configuration=${{ env.BUILD_TYPE }} /P:Platform=x64 /VERBOSITY:MINIMAL
 
       - name: Upload installer
         if: "${{ github.event_name == 'release' }}"