Move dependencies in 'external' directory and pdate git submodules

external/Catch2/.conan/test_package/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.15)
+project(PackageTest CXX)
+
+find_package(Catch2 CONFIG REQUIRED)
+
+add_executable(test_package test_package.cpp)
+target_link_libraries(test_package Catch2::Catch2WithMain)
+target_compile_features(test_package PRIVATE cxx_std_14)

external/Catch2/.conan/test_package/conanfile.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from conan import ConanFile
+from conan.tools.cmake import CMake, cmake_layout
+from conan.tools.build import can_run
+from conan.tools.files import save, load
+import os
+
+
+class TestPackageConan(ConanFile):
+    settings = "os", "compiler", "build_type", "arch"
+    generators = "CMakeToolchain", "CMakeDeps", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def layout(self):
+        cmake_layout(self)
+
+    def generate(self):
+        save(self, os.path.join(self.build_folder, "package_folder"),
+             self.dependencies[self.tested_reference_str].package_folder)
+        save(self, os.path.join(self.build_folder, "license"),
+             self.dependencies[self.tested_reference_str].license)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if can_run(self):
+            cmd = os.path.join(self.cpp.build.bindir, "test_package")
+            self.run(cmd, env="conanrun")
+
+            package_folder = load(self, os.path.join(self.build_folder, "package_folder"))
+            license = load(self, os.path.join(self.build_folder, "license"))
+            assert os.path.isfile(os.path.join(package_folder, "licenses", "LICENSE.txt"))
+            assert license == 'BSL-1.0'

external/Catch2/.conan/test_package/test_package.cpp

@@ -0,0 +1,13 @@
+#include <catch2/catch_test_macros.hpp>
+
+int Factorial( int number ) {
+    return number <= 1 ? 1 : Factorial( number - 1 ) * number;
+}
+
+TEST_CASE( "Factorial Tests", "[single-file]" ) {
+    REQUIRE( Factorial(0) == 1 );
+    REQUIRE( Factorial(1) == 1 );
+    REQUIRE( Factorial(2) == 2 );
+    REQUIRE( Factorial(3) == 6 );
+    REQUIRE( Factorial(10) == 3628800 );
+}