Added fmt::to_wstring() in addition to fmt::to_string() (#559). Thanks @alabuzhev (Alex Alabuzhev).

Added support for C++17 std::string_view (#571 and #578). Thanks @thelostt (Mário Feroldi) and @mwinterb.

Enabled stream exceptions to catch errors (#581). Thanks @crusader-mike.

Allowed formatting of class hierarchies with fmt::format_arg() (#547). Thanks @rollbear (Björn Fahller).

Removed limitations on character types (#563). Thanks @Yelnats321 (Elnar Dakeshov).

Conditionally enabled use of std::allocator_traits (#583). Thanks @mwinterb.

Added support for const variadic member function emulation with FMT_VARIADIC_CONST (#591). Thanks @ludekvodicka (Ludek Vodicka).

Various bugfixes: bad overflow check, unsupported implicit type conversion when determining formatting function, test segfaults (#551), ill-formed macros (#542) and ambiguous overloads (#580). Thanks @xylosper (Byoung-young Lee).

Prevented warnings on MSVC (#605, #602, and #545), clang (#582), GCC (#573), various conversion warnings (#609, #567, #553 and #553), and added override and [[noreturn]] (#549 and #555). Thanks @alabuzhev (Alex Alabuzhev), @virgiliofornazin (Virgilio Alexandre Fornazin), @alexanderbock (Alexander Bock), @yumetodo, @VaderY (Császár Mátyás), @jpcima (JP Cimalando), @thelostt (Mário Feroldi), and @Manu343726 (Manu Sánchez).

Improved CMake: Used GNUInstallDirs to set installation location (#610) and fixed warnings (#536 and #556). Thanks @mikecrowe (Mike Crowe), @evgen231 and @henryiii (Henry Schreiner).