fix: export mToNs used in README console.table example (#592)

Closes #591

Author: jerome-benoit

src/index.ts

@@ -37,4 +37,4 @@ export type {
   TimestampProvider,
   TimestampValue,
 } from './types'
-export { formatNumber, hrtimeNow, performanceNow as now, nToMs } from './utils'
+export { formatNumber, hrtimeNow, mToNs, performanceNow as now, nToMs } from './utils'