1.9.0

• Bug fix in segmented_devector::insert_range: Auxiliary iterator was declared too early and was pointing to out-of-range, but it wasn't used. Now, iterator declaration is made in inner scope where it is actually used.
• New associative containers implemented as red-black tree:
  • map
  • set
  • multimap
  • multiset
  • small_map
  • small_set
  • small_multimap
  • small_multiset
  • static_map
  • static_set
  • static_multimap
  • static_multiset
• All containers: Added range constructor container(sfl::from_range_t, Range&& r) that is also available in C++11.
• All containers: Added range insertion function insert_range(Range&& r) that is also available in C++11.
• All vectors and devectors: Added range assignment function assign_range(Range&& r) that is also available in C++11.
• All vectors and devectors: Added range append function append_range(Range&& r) that is also available in C++11.
• All devectors: Added range prepend function prepend_range(Range&& r) that is also available in C++11.
• Refactored and removed private.hpp.
• GitHub actions: Use Ubuntu 24.04.
• GitHub actions: Use matrix strategies.