update src and test

tests/sla_print/sla_zcorrection_tests.cpp

@@ -1,4 +1,6 @@
-#include <catch2/catch.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
+#include <catch2/generators/catch_generators.hpp>
 #include <test_utils.hpp>
 
 #include <algorithm>
@@ -8,6 +10,8 @@
 #include "libslic3r/MTUtils.hpp"
 #include "libslic3r/SVG.hpp"
 
+using Catch::Approx;
+
 void print_depthmap(std::string_view prefix,
                     const Slic3r::BoundingBox &bb,
                     const Slic3r::sla::zcorr_detail::DepthMap &dm)