Consider indicator dependency framework

[jpmckinney]

Right now, dependencies are handled by Indicators.run, but as the number of indicators grows, this might become harder to manage.

cardinal-rs/src/lib.rs

Lines 164 to 171 in 0fecdeb

	if *map && (settings.R025.is_some() || settings.R038.is_some()) {
	indicators.push(Box::new(Tenderers::new(&mut settings)));
	}
	// Must run before indicator initialization, which mutates settings.
	if settings.R024.is_some() || settings.R058.is_some() {
	indicators.push(Box::new(SecondLowestBidRatio::new(&mut settings)));
	}