Fix MSVC compile errors

...\eigenpy\src\eigenpy.cpp : fatal error C1128:
number of sections exceeded object file format limit: compile with /bigobj

CMakeLists.txt

@@ -122,6 +122,7 @@ SET(${PROJECT_NAME}_SOURCES
 
 ADD_LIBRARY(${PROJECT_NAME} SHARED ${${PROJECT_NAME}_SOURCES} ${${PROJECT_NAME}_HEADERS})
 SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES OUTPUT_NAME "${PROJECT_NAME}${PYTHON_SOABI}")
+TARGET_COMPILE_OPTIONS(${PROJECT_NAME} PRIVATE $<$<CXX_COMPILER_ID:MSVC>:-bigobj>)
 
 TARGET_LINK_BOOST_PYTHON(${PROJECT_NAME})
 PKG_CONFIG_USE_DEPENDENCY(${PROJECT_NAME} eigen3)