template second parameter for startsWith

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/utils.hpp

@@ -6,8 +6,13 @@
 
 namespace Exiv2::Internal {
 
-constexpr bool startsWith(std::string_view s, std::string_view start) {
+template <typename T>
+constexpr bool startsWith(std::string_view s, T start) {
+#ifdef __cpp_lib_starts_ends_with
+  return s.starts_with(start);
+#else
   return s.find(start) == 0;
+#endif
 }
 
 /// @brief Returns the uppercase version of \b str