asap: add package (#2507)

packages/a/asap/xmake.lua

@@ -0,0 +1,21 @@
+package("asap")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/mobius3/asap")
+    set_description("A C++ header-only library for creating, displaying, iterating and manipulating dates")
+    set_license("MIT")
+
+    add_urls("https://github.com/mobius3/asap.git")
+    add_versions("2023.04.21", "e39f2fe178de2ccba816d45811bf23ae0147fcb1")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <asap/asap.h>
+            void test() {
+                asap::datetime d1;
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)