Version 2.2.1 (stable)

Most notable changes since v1.6:

• Support for stateful allocators, including std::polymorphic_allocator
• Exceptions disabled is supported
• Most dynarray functions support types that are not trivially relocatable (but then require nothrow move constructible)
• Insert a range of multiple objects with insert_r
• A bunch of new view stuff (as in C++20 ranges), including an efficient view::transform
• Support for aggregates in make_unique and emplace_back
• Boost no longer required for over-aligned allocation

Fixed in v2.2.1: Class template argument deduction failed with Clang