Force c++20 when building

Author: Hind-M

.github/workflows/windows.yml

@@ -36,6 +36,7 @@ jobs:
             -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} ^
             -DCMAKE_INSTALL_PREFIX=%CONDA_PREFIX% ^
             -DCMAKE_PREFIX_PATH=%CONDA_PREFIX% ^
+            -DCMAKE_CXX_STANDARD=20 ^
             -DSPARROW_IPC_BUILD_SHARED=${{ matrix.build_shared }} ^
             -DBUILD_TESTS=ON
           if %errorlevel% neq 0 exit /b %errorlevel%
@@ -70,6 +71,7 @@ jobs:
             -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} ^
             -DCMAKE_INSTALL_PREFIX=%CONDA_PREFIX% ^
             -DCMAKE_PREFIX_PATH=%CONDA_PREFIX% ^
+            -DCMAKE_CXX_STANDARD=20 ^
             -DSPARROW_IPC_BUILD_SHARED=${{ matrix.build_shared }} ^
             -DFETCH_DEPENDENCIES_WITH_CMAKE=MISSING ^
             -DBUILD_TESTS=ON