Add sfGetVersion to retrieve the runtime SFML version

test/System/Version.test.cpp

@@ -0,0 +1,15 @@
+#include <CSFML/System/Version.h>
+
+#include <catch2/catch_test_macros.hpp>
+
+#include <string>
+
+TEST_CASE("[System] sfGetVersion")
+{
+    const sfVersion version = sfGetVersion();
+    CHECK(version.major == 3);
+    CHECK(version.minor >= 1);
+    CHECK(version.patch >= 0);
+    REQUIRE(version.string != nullptr);
+    CHECK(std::string(version.string).rfind(std::to_string(version.major) + "." + std::to_string(version.minor), 0) == 0);
+}