chore (file_response): implement macro for crystal version check (#1918)

* chore (file): implement macro for crystal version check

* refactor (file_response): improve version check macro

Author: aarcex3

src/lucky/file_response.cr

@@ -120,7 +120,13 @@ class Lucky::FileResponse < Lucky::Response
     File.expand_path(path, Dir.current)
   end
 
-  private def file_exists? : Bool
-    File.file?(full_path) && File.readable?(full_path)
-  end
+  {% if compare_versions(Crystal::VERSION, "1.13.0") >= 0 %}
+    private def file_exists? : Bool
+      File.file?(full_path) && File::Info.readable?(full_path)
+    end
+  {% else %}
+    private def file_exists? : Bool
+      File.file?(full_path) && File.readable?(full_path)
+    end
+  {% end %}
 end