message: cmake: use swig_add_modules if cmake > 3.7
  swig_add_module has been deprecated
diff: @@ -252,7 +252,11 @@ macro(_upm_swig_python)
  # Swig module name (example: pyupm_a110x-python2)
  set (python_wrapper_name pyupm_${libname}-python${PYTHON_VERSION_MAJOR})
  + if (CMAKE_VERSION VERSION_LESS "3.8")
  swig_add_module (${python_wrapper_name} python pyupm_${libname}.i)
  + else ()
  + swig_add_library (${python_wrapper_name} LANGUAGE python SOURCES pyupm_${libname}.i)
  + endif ()
  # Get target library name (example _pyupm_a110x-python2)
  set (python_wrapper_target ${SWIG_MODULE_${python_wrapper_name}_REAL_NAME})
  add_dependencies(${python_wrapper_target} ${libname})
  @@ -360,7 +364,11 @@ macro(upm_swig_node)
  set_property (SOURCE jsupm_${libname}.i PROPERTY SWIG_FLAGS "-node" "-DV8_VERSION=${V8_VERSION_HEX}")
  set_source_files_properties (jsupm_${libname}.i PROPERTIES CPLUSPLUS ON)
  + if (CMAKE_VERSION VERSION_LESS "3.8")
  swig_add_module (jsupm_${libname} javascript jsupm_${libname}.i)
  + else ()
  + swig_add_library (jsupm_${libname} LANGUAGE javascript SOURCES jsupm_${libname}.i)
  + endif ()
  add_dependencies(jsupm_${libname} ${libname})
  swig_link_libraries (jsupm_${libname} ${NODE_LIBRARIES} ${libname})
  target_include_directories ( ${SWIG_MODULE_jsupm_${libname}_REAL_NAME}
  @@ -430,7 +438,11 @@ macro(upm_swig_java)
  # the source must be added when building the JAVA wrapper.
  # See issue #518
  # TODO: Fix this somehow
  + if (CMAKE_VERSION VERSION_LESS "3.8")
  swig_add_module (javaupm_${libname} java javaupm_${libname}.i ${module_src})
  + else ()
  + swig_add_library (javaupm_${libname} LANGUAGE java SOURCES javaupm_${libname}.i ${module_src})
  + endif ()
  # If the C++ target depends on C++ interfaces, make the JAVA target
  # depend on the JAVA interfaces
  