Release 0.12.2

0.12.2
- Fix reconnect issues when Stream Management is enabled (#211)
- Fix resolver ... this time for real hopefully (fixup of #200) (#214)
- Fix clearing of password cache on resumed connection (#214)
- Improve detection&implementation of va_copy (#213)
- Fix Valgrind CI builds against LibreSSL (#212)
- Fix perf example on platforms where an rdtsc() equivalent isn't implemented (#212)