added missing pybind dependency

dependencies/pybind11/CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.21)
+project(InstallGoogletest)
+
+include(ExternalProject)
+
+list(APPEND CMAKE_ARGS
+    -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
+    )
+
+message(STATUS "Preparing external project \"pybind11\" with args:")
+foreach(CMAKE_ARG ${CMAKE_ARGS})
+    message(STATUS "-- ${CMAKE_ARG}")
+endforeach()
+
+ExternalProject_Add(
+    pybind11
+    GIT_REPOSITORY https://github.com/pybind/pybind11.git
+    GIT_TAG v2.11.1
+    PREFIX ${CMAKE_BINARY_DIR}/pybind11
+    CMAKE_ARGS ${CMAKE_ARGS}
+)
+