Fixed the version number in the inline namespace (#2374).

Added a missing presentation type check for std::string (#2402).

Fixed a linkage error when mixing code built with clang and gcc (#2377).

Fixed documentation issues (#2396, #2403, #2406). Thanks @mkurdej (Marek Kurdej).

Removed dead code in FP formatter ( #2398). Thanks @javierhonduco (Javier Honduvilla Coto).

Fixed various warnings and compilation issues (#2351, #2359, #2365, #2368, #2370, #2376, #2381, #2382, #2386, #2389, #2395, #2397, #2400 #2401, #2407). Thanks @zx2c4 (Jason A. Donenfeld), @AidanSun05 (Aidan Sun), @mattiasljungstrom (Mattias Ljungström), @joemmett (Jonathan Emmett), @erengy (Eren Okka), @patlkli (Patrick Geltinger), @gsjaardema (Greg Sjaardema), @phprus (Vladislav Shchapov).