Boost on main updated to v1.82

Hello, As of yesterday, the main branch now uses version 1.82 of Boost. The main driver of the change is improved functionality in Boost.Asio. C++20 coroutines are the biggest motivator, but there are other nice things like a type-erased handler class. A minor caveat: Due to an unfixed ODR violation introduced in Boost.Phoenix 1.81 (https://github.com/boostorg/phoenix/issues/111), we disable Phoenix's tuple support, also introduced in 1.81. Hopefully the bug will be fixed in the next version. Thank you.