Fix build.

include/eepp/system/md5.hpp

@@ -3,7 +3,7 @@
 
 #include <eepp/core.hpp>
 #include <eepp/system/iostream.hpp>
-#include <vector>
+#include <array>
 
 namespace EE { namespace System {
 

include/eepp/ui/doc/textdocument.hpp

@@ -1,6 +1,7 @@
 #ifndef EE_UI_DOC_TEXTDOCUMENT
 #define EE_UI_DOC_TEXTDOCUMENT
 
+#include <array>
 #include <atomic>
 #include <eepp/core/string.hpp>
 #include <eepp/network/http.hpp>