fix: include debug info on failures (#946)

Adding debug info on failures.

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Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CMakeLists.txt

@@ -92,5 +92,6 @@ else()
 endif()
 target_include_directories(_core PRIVATE extern/root/math/minuit2/inc)
 set_target_properties(_core PROPERTIES VISIBILITY_INLINES_HIDDEN ON)
+target_compile_definitions(_core PUBLIC PYBIND11_DETAILED_ERROR_MESSAGES=1)
 
 install(TARGETS _core DESTINATION iminuit)