feat: Export Tracker.

Author: ShogunPanda

src/index.ts

@@ -18,6 +18,7 @@ type PromiseRejecter = (err: Error) => void
 
 export * from './models.ts'
 export { printResults } from './print.ts'
+export * from './tracker.ts'
 
 function scheduleNextTest(context: Context): void {
   // We still have work to do