[Yanhu007]

Fixes #156

Problem

collect() filters out errored results but never appends results after the last errored index. For example:

p := pool.NewWithResults[int]().WithErrors()
p.Go(func() (int, error) { return 1, nil })
p.Go(func() (int, error) { return 0, errors.New("err") })
p.Go(func() (int, error) { return 3, nil })
results, _ := p.Wait()
// Got:    [1]
// Expect: [1, 3]

The loop iterates over errored indices and appends slices between errors, but after the loop ends it doesn't append the remaining tail from lastErr+1 to the end.

Fix

After the filtering loop, append r.results[lastErr+1:] if there are remaining results.

All existing tests pass.

[Yanhu007]

Superseded by #162 which has a cleaner fix. Closing this one.