Richard

Fixes deprecated syscall issue on macOS 10.12 [#23](https://github.com/mfreiholz/humblelogging/issues/23)

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…m/mfreiholz/humblelogging/issues/23) * Visual Studio 2015 adds support for %zu (see change in src/formatter/patternformatter.cpp) * I recommend storing the ThreadID as size_t or an equivalent since that appears to be the...

When executing the make command the following warning is generated on macOS: ```bash /Users/richardosborne/Projects/humblelogging/src/util/processinfo.cpp:28:9: warning: 'syscall' is deprecated: first deprecated in macOS 10.12 - syscall(2) is unsupported; please switch to...