Add PRIVATE keyword

Inst_eddies/Tests/CMakeLists.txt

 # test_get_1_outerm
 add_executable(test_get_1_outerm test_get_1_outerm.f90)
-target_link_libraries(test_get_1_outerm Geometry::geometry
+target_link_libraries(test_get_1_outerm PRIVATE Geometry::geometry
   NetCDF95::netcdf95 Shapelib_03::shapelib_03 Contour_531::contour_531
   Jumble::jumble NetCDF_Fortran::netcdff)
 
@@ -19,12 +19,12 @@ target_link_libraries(test_good_contour PRIVATE Geometry::geometry
 
 # test_inside_4
 add_executable(test_inside_4 test_inside_4.f90)
-target_link_libraries(test_inside_4 Geometry::geometry Shapelib_03::shapelib_03
-  Jumble::jumble)
+target_link_libraries(test_inside_4 PRIVATE Geometry::geometry
+  Shapelib_03::shapelib_03 Jumble::jumble)
 
 # test_mean_speed
 add_executable(test_mean_speed test_mean_speed.f90)
-target_link_libraries(test_mean_speed Numer_Rec_95::numer_rec_95
+target_link_libraries(test_mean_speed PRIVATE Numer_Rec_95::numer_rec_95
   NetCDF95::netcdf95 Shapelib_03::shapelib_03 Contour_531::contour_531
   NetCDF_Fortran::netcdff gpc_f Jumble::jumble)
 
@@ -37,17 +37,17 @@ target_link_libraries(test_max_speed_contour_ssh PRIVATE
 
 # test_nearby_extr
 add_executable(test_nearby_extr test_nearby_extr.f90)
-target_link_libraries(test_nearby_extr Shapelib_03::shapelib_03
+target_link_libraries(test_nearby_extr PRIVATE Shapelib_03::shapelib_03
   Contour_531::contour_531 Jumble::jumble gpc_f Numer_Rec_95::numer_rec_95)
 
 # test_local_extrema
 add_executable(test_local_extrema test_local_extrema.f90)
-target_link_libraries(test_local_extrema NetCDF95::netcdf95
+target_link_libraries(test_local_extrema PRIVATE NetCDF95::netcdf95
   Jumble::jumble NetCDF_Fortran::netcdff)
 
 # test_set_max_speed
 add_executable(test_set_max_speed test_set_max_speed.f90)
-target_link_libraries(test_set_max_speed Geometry::geometry
+target_link_libraries(test_set_max_speed PRIVATE Geometry::geometry
   Numer_Rec_95::numer_rec_95 NetCDF95::netcdf95
   Shapelib_03::shapelib_03 Contour_531::contour_531 Jumble::jumble
   NetCDF_Fortran::netcdff gpc_f)