PostBoost.Graph 1.95 will be C++17

Boost.Graph 1.95 will be C++17 Dear Boost.Graph community, In two release cycles (Boost release 1.95 in summer 2027) Boost.Graph will be bumped to C++17 😄 This decision follows two polls that did not surface any C++14 user base or demand while identifiying users stuck in C++17: [Bumping BGL's minimum C++ standard: input wanted on target version #490](https://github.com/boostorg/graph/discussions/490) Reddit poll This standard version bump will bring benefits for maintenance, API and dependencies reduction: `if constexpr`, constexpr lambdas, `[[nodiscard]]`, `[[maybe_unused]]` ... std::any instead of boost::any `std::invoke_result` instead of `boost::result_of` ... We will not be able to guarantee backward compatibility with C++14. Please contact us if you are stuck in C++14. The GIthub Discussion lives here: https://github.com/boostorg/graph/discussions/613 https://redd.it/1wt531i @r_cpp