Add DP and SP builds to CI tests

.github/workflows/fieldapi_tests.yml

@@ -15,6 +15,7 @@ jobs:
       matrix:
         # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
         build_type: [RelWithDebInfo]
+        precision: ['SINGLE', 'DOUBLE']
 
     steps:
     - uses: actions/checkout@v3
@@ -56,7 +57,7 @@ jobs:
          fiat_ROOT: ${{github.workspace}}/fiat/build
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DENABLE_ACC=OFF
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DENABLE_ACC=OFF -DENABLE_${{matrix.precision}}_PRECISION=ON
 
     - name: Build field_api
       # Build your program