CI: update CI to build and test new code

Author: Raghuveer Devulapalli

.github/workflows/c-cpp.yml

@@ -235,7 +235,7 @@ jobs:
         CXX: g++-10
       run: |
         make clean
-        meson setup -Dbuild_tests=true -Duse_openmp=true --warnlevel 2 --werror --buildtype release builddir
+        meson setup -Dbuild_tests=true -Duse_openmp=true --Duse_stdthreads=true --warnlevel 2 --werror --buildtype release builddir
         cd builddir
         ninja