Add missing BUILD_SHARED_LIBS variable back

Author: friendlyanon

cmake-init/templates/common/cmake/variables.cmake

@@ -6,7 +6,7 @@
 # consumers can trivially build and package the project
 if(PROJECT_IS_TOP_LEVEL)
   option(%(name)s_DEVELOPER_MODE "Enable developer mode" OFF)
-
+{type shared}  option(BUILD_SHARED_LIBS "Build shared libs." OFF){end}
   if("$ENV{CI}")
     set(%(name)s_DEVELOPER_MODE ON CACHE INTERNAL "")
   endif()