cpp-semver-easz: new package (#7366)

* cpp-semver-easz: new package

* Update xmake.lua

packages/c/cpp-semver-easz/xmake.lua

@@ -0,0 +1,24 @@
+package("cpp-semver-easz")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/easz/cpp-semver")
+    set_description("cpp-semver - Semantic Versioning in C++ header-only C++11")
+    set_license("MIT")
+
+    add_urls("https://github.com/easz/cpp-semver.git", {submodules = false})
+    add_versions("2021.12.10", "7b9141d99044e4d363eb3b0a81cfb1546a33f9dd")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <iostream>
+            #include <cpp-semver.hpp>
+            void test() {
+                const std::string ver1 = "1.0.0 || 1.5 - 3.0";
+                const std::string ver2 = ">1.1 <2.0";
+                const bool intersected = semver::intersects(ver1, ver2);
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)