Version 0.1.49

Changelog

emcmake and emmake are now used when compiling to emscripten targets. (#137)
On 32 bit x86 MSVC targets, the toolset is now always explicitly configured rather than checking the version of MSVC first. (#144)
--parallel is no longer passed to versions of cmake that might not support that flag. (#146)
If a missing directory is provided via the Config::out_dir API, we will now properly create it rather than failing and reporting a confusing message that cmake is not installed, even if it is. (#159)
CMAKE_OSX_ARCHITECTURES is passed on macOS so that we no longer produce universal binaries by default. (#160)
Several improvements have been made to cross-compilation support. (#158)
If make jobserver flags are present in MAKEFLAGS, we now will respect them (by not passing --parallel to cmake). (#153)

Additionally, a number of smaller changes which shouldn't impact users have been made; see the commit history for complete details.

Thanks to everybody who contributed to this release!