try adding ENABLE_TESTS=ON to cmake CI

Author: jacobwilliams

.github/workflows/CI.yml

@@ -78,7 +78,7 @@ jobs:
         GCOV=gcov-${{matrix.gcc_v}}
         mkdir cmake-build
         cd cmake-build
-        cmake ..
+        cmake -D ENABLE_TESTS=ON ..
         make -j 4 check
 
     - name: Compile_with_build_mkdocs