Group units, formatting, and statistics under quantity

src/export/json.rs

@@ -4,7 +4,7 @@ use serde_json::to_vec_pretty;
 use super::Exporter;
 use crate::benchmark::benchmark_result::BenchmarkResult;
 use crate::options::SortOrder;
-use crate::util::units::Unit;
+use crate::quantity::TimeUnit;
 
 use anyhow::Result;
 
@@ -20,7 +20,7 @@ impl Exporter for JsonExporter {
     fn serialize(
         &self,
         results: &[BenchmarkResult],
-        _unit: Option<Unit>,
+        _unit: Option<TimeUnit>,
         _sort_order: SortOrder,
     ) -> Result<Vec<u8>> {
         let mut output = to_vec_pretty(&HyperfineSummary { results });