sfl-library: add package (#4003)

packages/s/sfl-library/xmake.lua

@@ -0,0 +1,18 @@
+package("sfl-library")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/slavenf/sfl-library")
+    set_description("C++11 header-only library. Small and static vector. Small and static flat map/set. Compact vector. Segmented vector.")
+    set_license("zlib")
+
+    add_urls("https://github.com/slavenf/sfl-library/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/slavenf/sfl-library.git")
+
+    add_versions("1.5.0", "767d9b3627540071d2a80f18f034d80d6e9eaffc027876c7898c51aeebd3bf37")
+
+    on_install(function (package)
+        os.vcp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:has_cxxtypes("sfl::small_vector<int, 4>", {configs = {languages = "c++11"}, includes = "sfl/small_vector.hpp"}))
+    end)