Log Message:
inih: update to 57.

MSVC throws C4244 by @AbsintheScripting in #142
Added a GetUnsigned function for getting unsigned values. by @jcormier in #147
meson.build: fix start-of-line_comment_prefix variable name by @ihilt in #149
Added GetInteger64 and GetUnsigned64 to read 64-bit integers by @natcat256 in #151
Fix redundant cast-to-int when INI_USE_STACK!=0
Make inline comments work on subsequent lines of multiline values
Added "version" to meson.build config: #135 (but bumped up to 55 in a \ 
subsequent commit, for this release).
Mainly #134, adding the visibility symbols to the Meson build config, but also \ 
other small tweaks to tests and so on.