Only emit timestamp if options.timestamp is set
Only emit timestamp if options.timestamp is set

The console sink doesn't need to show a timestamp by default.

lyallaward/structured-log,serilog/serilog.js,structured-log/structured-log,serilog/serilog.js,codecapers/structured-log,codecapers/structured-log,structured-log/structured-log,lyallaward/structured-log