Fix missing include

SGauvin · web-flow · commit a05cedfa3215 · 2025-08-18T20:23:27.000-04:00
date_time.hpp was not including std_optional.hpp directly. It probably got it transitively from other files including it directly.
This caused clangd to complain at every `#include &lt;toml++/toml.hpp&gt;`
diff --git a/include/toml++/impl/date_time.hpp b/include/toml++/impl/date_time.hpp
@@ -7,6 +7,7 @@
 #include "forward_declarations.hpp"
 #include "print_to_stream.hpp"
 #include "header_start.hpp"
+#include "std_optional.hpp"
 
 TOML_NAMESPACE_START
 {

Original file line number	Diff line number	Diff line change
`@@ -7,6 +7,7 @@`
`7`	`7`	`#include "forward_declarations.hpp"`
`8`	`8`	`#include "print_to_stream.hpp"`
`9`	`9`	`#include "header_start.hpp"`
	`10`	`+#include "std_optional.hpp"`
`10`	`11`
`11`	`12`	`TOML_NAMESPACE_START`
`12`	`13`	`{`