fix windows ci

Author: traversc

.github/workflows/windows.yml

@@ -54,6 +54,8 @@ jobs:
       - name: Configure
         run: >
           cmake -S . -B build -G Ninja
+          -DCMAKE_C_COMPILER=cl
+          -DCMAKE_CXX_COMPILER=cl
           -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_ROOT\scripts\buildsystems\vcpkg.cmake"
           -DVCPKG_TARGET_TRIPLET=x64-windows
           -DQDATA_BUILD_BENCHMARKS=ON

README.md

@@ -1,5 +1,9 @@
 # qdata-cpp
 
+[![Linux CI](https://github.com/qsbase/qdata-cpp/actions/workflows/linux.yml/badge.svg)](https://github.com/qsbase/qdata-cpp/actions/workflows/linux.yml)
+[![macOS CI](https://github.com/qsbase/qdata-cpp/actions/workflows/macos.yml/badge.svg)](https://github.com/qsbase/qdata-cpp/actions/workflows/macos.yml)
+[![Windows CI](https://github.com/qsbase/qdata-cpp/actions/workflows/windows.yml/badge.svg)](https://github.com/qsbase/qdata-cpp/actions/workflows/windows.yml)
+
 `qdata-cpp` is the standalone C++17 library for the qdata format.
 
 It is part of the `qs2` R package for efficient serialization, but is useful well beyond: in C++, qdata gives you a flexible, intuitive model for variable data structures, with very strong compression and performance characteristics.