Fix CI builds (#2)

* Update required CMake version

* Debugging

Author: peastman

CMakeLists.txt

@@ -2,7 +2,7 @@
 # OpenMM ONNX Plugin
 #----------------------------------------------------
 
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 
 # We need to know where OpenMM is installed so we can access the headers and libraries.
 SET(OPENMM_DIR "/usr/local/openmm" CACHE PATH "Where OpenMM is installed")

devtools/conda-envs/build-macos-latest.yml

@@ -13,5 +13,7 @@ dependencies:
 - openmm
 - onnxruntime
 - onnxruntime-cpp
+- khronos-opencl-icd-loader
+- pocl
 # test
 - pytest