Added version check

Author: anutosh491

CMakeLists.txt

@@ -86,6 +86,13 @@ if (NOT TARGET xtl)
 endif ()
 if (NOT TARGET xeus AND NOT TARGET xeus-static)
     find_package(xeus REQUIRED)
+    if (xeus_FOUND)
+        if (xeus_VERSION VERSION_LESS xeus_REQUIRED_VERSION)
+            message(FATAL_ERROR "xeus version must be >= ${xeus_REQUIRED_VERSION}, found: ${xeus_VERSION}")
+        else ()
+            message(STATUS "Found compatible xeus version: ${xeus_VERSION}")
+        endif ()
+    endif()
 endif ()
 
 # Flags