Removed CONSTEXPR requirement for a boost, as we need at least c++14 for rest of the code.

Author: Denis Chaplygin

CMakeLists.txt

@@ -530,9 +530,6 @@ else()
 
   find_package(Boost 1.54 REQUIRED COMPONENTS ${BOOST_COMPONENTS})
   add_dependency_includes(${Boost_INCLUDE_DIRS})
-  if(WIN32 AND Boost_VERSION VERSION_LESS 106200)
-    message(FATAL_ERROR "Building with MSVC needs Boost 1.62 with CXX11_CONSTEXPR support")
-  endif()
 
   find_package(TBB REQUIRED)
   add_dependency_includes(${TBB_INCLUDE_DIR})