Fix whitespace, make INTERFACE type

Signed-off-by: Ryan Friedman <ryanfriedman5410+github@gmail.com>

grid_map_costmap_2d/CMakeLists.txt

@@ -7,7 +7,6 @@ find_package(grid_map_cmake_helpers REQUIRED)
 find_package(grid_map_core REQUIRED)
 find_package(geometry_msgs REQUIRED)
 find_package(nav2_costmap_2d REQUIRED)
-
 find_package(tf2_ros REQUIRED)
 find_package(tf2_geometry_msgs REQUIRED)
 
@@ -23,15 +22,15 @@ set(dependencies
  tf2_geometry_msgs
 )
 
-add_library(${PROJECT_NAME}
+add_library(${PROJECT_NAME} INTERFACE
  include/grid_map_costmap_2d/costmap_2d_converter.hpp
  include/grid_map_costmap_2d/grid_map_costmap_2d.hpp
 )
 
 add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
 target_link_libraries(${PROJECT_NAME}
- PUBLIC
+ INTERFACE
  grid_map_core::grid_map_core
  ${geometry_msgs_TARGETS}
  ${tf2_geometry_msgs_TARGETS}
@@ -40,7 +39,7 @@ target_link_libraries(${PROJECT_NAME}
 )
 
 target_include_directories(${PROJECT_NAME}
- PUBLIC
+ INTERFACE
  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
  "$<INSTALL_INTERFACE:include/${PROJECT_NAME}>"
 )