chore(.travis.osx.yml): update homebrew lua package names

lua5.1: lua            => lua51
lua5.2: versions/lua52 => lua
fix(util/thread_script_state): make sure system does not crash during
finalization
fix(util/script_state_manager): crash when compiling with msys2 stack

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
fix(util/thread_script_state): disable script_state recycling at finalization time

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
feat(bin/linja): use relative paths
send visit when open