attempt to enable github actions

.github/workflows/cmake.yml

@@ -6,9 +6,10 @@ on:
   pull_request:
     branches: [ develop, master ]
 
-env:
-  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
-  BUILD_TYPE: [ Release,  Debug ]
+#env:
+#  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+#  matrix:
+#    BUILD_TYPE: [ Release,  Debug ]
 
 jobs:
   build:
@@ -20,6 +21,8 @@ jobs:
     strategy:
       matrix:
         python-version: [ '3.6', '3.9' ]
+        env:
+          BUILD_TYPE: [ Release,  Debug ]
     name: Ubuntu with Python ${{ matrix.python-version }}
 
     steps: