Enable --universal-time by default

[tyt2y3]

I think we can enable this by default on 0.11

Dependent: SeaQL/seaql.github.io#84

[billy1624]

A good step forward! I think it's better to have a fallback option where the entity file is named with local time. Something like --local-time?

I'm more than happy to add that for you. What's your opinion?

[tyt2y3]

I think --universal-time=false is always available
Unless we make --local-time https://docs.rs/clap/latest/clap/builder/struct.Arg.html#method.conflicts_with
It will be quite cumbersome, so I am fine with or without it.

[billy1624]

Flag in clap does not take value unless it's an option. I.e. --universal-time=true clap-rs/clap#1649 (comment)

I'll go and add a --local-time flag and make it mutual exclusive to each other.