Vuls: v0.15.11

Changelog

740781a feat(logging): add -log-to-file and don’t output to file by default (#1209)
36c9c22 fix(report): avoid nil pointer when report FreeBSD (#1208)
183fdcb fix: support for missing files in the results or results directory (#1206)
a2a6979 refactor: move const to constant pkg (#1205)